Citizen, let's start with the simple divisions related to how one is saved. In one corner we that the Calvinists and neo-Calvinists comprising largely are: The Presbyterian Churches: Denominations like the Presbyterian Church in America (PCA) and the Orthodox Presbyterian Church. (Note: The much larger PCUSA is historically Reformed, but more "liberal." In the modern day, it is largely represented by the Continental Reformed, Presbyterian, and Congregational traditions, as well as parts of the Anglican, Baptist and Waldensian traditions, in addition to a minority of people belonging to the Methodist faith (known as Calvinistic Methodists) The core "Truth" of Calvinism is that God decided before He created the world who would be saved, thus all others are condemned to hell. Nobody "chosen" can fall no matter how anti-Christ their life and nobody no matter how devout and faithful can be saved. Jesus died only for the "elect" and nobody else.
Those supporting the Calvinistic theology include:
John Piper: Former pastor of Bethlehem Baptist Church in Minneapolis and founder of Desiring God. He is a primary figure in modern "New Calvinism." John MacArthur: Pastor-teacher of Grace Community Church in California and featured voice on Grace to You. While some debate his classification because he does not adhere to traditional Covenant Theology, his soteriology (doctrine of salvation) is historically Calvinistic. Tim Keller: The founding pastor of Redeemer Presbyterian Church in New York City and a key figure in the The Gospel Coalition network. Tim Challies R.C. Sproul: Founder of Ligonier Ministries and a widely celebrated Reformed theologian and pastor. Mark Dever: Pastor of Capitol Hill Baptist Church in Washington D.C. and primary leader of 9Marks. Matt Chandler: Lead pastor of The Village Church in Texas and a prominent preacher within the Acts 29 Network. Charles Spurgeon (Historical): Often called the "Prince of Preachers," this 19th-century English Baptist pastor of the Metropolitan Tabernacle in London heavily championed Calvinist doctrines.
Those supporting Arminian theology which opposes Calvin theology include:
Billy Graham. Methodist and Wesleyan TraditionsThe United Methodist Church (UMC): The largest representative of Wesleyan theology, affirming free will and prevenient grace.The Wesleyan Church and Free Methodist Church: Both stem directly from the 18th-century Methodist movement and uphold Arminian soteriology.The Church of the Nazarene: A prominent denomination in the broader Holiness movement that strictly adheres to the teachings of Jacobus Arminius and John Wesley.2. Pentecostal and Charismatic Churches Assemblies of God (AG): The largest Pentecostal denomination, which holds that Christ died for all and affirms the believer's free will to accept or reject grace.Church of God (Cleveland, Tennessee) and Church of God in Christ (COGIC): Both emphasize personal choice in salvation and the empowering work of the Holy Spirit.International Church of the Foursquare Gospel: Another major charismatic body that aligns with Arminian views on grace and atonement.3. Baptist Denominations Free Will Baptists: This group historically rejects the Calvinist doctrine of "eternal security" or "once saved, always saved," teaching instead that believers can fall from grace.General Baptists. Unlike the "Particular Baptists" (who are Calvinist), General Baptists trace their heritage to the early 17th century, advocating for a general/unlimited atonement.
Brethren and Pietist: Brethren Church (Ashland), Brethren in Christ Church, Church of the United Brethren in Christ, Evangelical Congregational Church, Evangelical Covenant Church, Evangelical Free Church of America [SEA editor’s note: the Evangelical Free Church of America is officially neutral on Arminian vs. Calvinist vs. Lutheran soteriology and allows all of them.
Holiness (these are mostly offshoots of the Methodist tradition): The Christian and Missionary Alliance, Church of Christ, Holiness, Church of God (Anderson, Indiana), Church of God (Holiness), Church of the Nazarene, Churches of Christ in Christian Union, Churches of God, General Conference (Winebrenner), The Free Methodist Church of North America, The Wesleyan Church are Armenian
Christian and Restorationist Churches (Stone-Campbellite Tradition): Independent Christian Churches and Churches of Christ, Christian Congregation, Inc. are Arminian
Adventist: Advent Christian Church General Conference, Grace Communion International (formerly the Worldwide Church of God).
Pentecostal: Assemblies of God, International Fellowship of Christian Assemblies, Church of God (Cleveland, Tennessee), Church of God in Christ, Congregational Holiness Church, Elim Fellowship, Fire Baptized Holiness Church of God, Independent Assemblies of God, Fellowship of Christian Assemblies, International Church of the Foursquare Gospel, International Pentecostal Holiness Church, Open Bible Churches, Pentecostal Church of God, Pentecostal Free Will Baptist Church, United Holy Church of God, Vineyard Churches International are Arminian.
Protestantism makes up about 40% of the U.S. population, and the vast majority of these denominations fall under the Arminian umbrella rather than the Calvinist (Reformed) umbrella.
Explicitly Arminian/Wesleyan Denominations: The United Methodist Church, the Global Methodist Church, the Church of the Nazarene, the Wesleyan Church, and the Assemblies of God (along with most Pentecostal and Charismatic churches) are fundamentally rooted in Arminian soteriology.
Baptist and Non-Denominational Churches: The Southern Baptist Convention (the largest Protestant body) and the booming non-denominational sector mostly practice a form of Arminianism. While they often include a blend of beliefs—such as pairing the Arminian view of free choice with the Calvinist view of "eternal security" or "once saved, always saved"—their day-to-day theology emphasizes individual choice.
The Restoration Movement: Churches of Christ and Christian Churches reject Calvinism outright, emphasizing human responsibility and the personal decision to accept faith and baptism.
The Catholic Dynamic: While Roman Catholics (19% of the U.S. population) are not Protestant and do not identify as Arminian, Catholic soteriology similarly rejects Calvinist double-predestination and strongly emphasizes free will, aligning them closer to the Arminian side of the spectrum.
So there are some "facts" and as you will note each traces its beliefs and subsequent Truth about salvation to those of the 16th, 18th and 21st centuries.
If you have counter facts, please present them