NO, I have read the Doctrinal Statements of Faith from the vast majority of Mainline Christian Denominations, and our main CORE of Beliefs is the same, it is the little things that separate the Denominations that we differ and argue about.
The CORE of Mainline Christianity's Doctrinal Beliefs
The Inerrancy of the Inspired WORD of GOD in their original manuscripts.
The Doctrine of the Holy Trinity.
The Deity and Humanity of JESUS CHRIST.
The fallen state of man, is in need of Salvation.
The price for sin was paid for on the Cross by Jesus Christ.
The physical resurrection and ascension of Jesus Christ.
Christ will Come Again!
ETC., as I am sure there are other things we can all agree on.
Just in case you are thinking that is not so, because I have seen lots of people here on this site who do not believe in the Deity of Jesus Christ and deny the Doctrine of the Holy Trinity. Those denominations are not considered to be part of Mainline Christianity by Mainline Denominations, but are a psuedo-Christian Cult, such as the Jehovah Witnesses and Mormons. Mainline Christianity believes that the following verse is talking about the Deity of Jesus Christ.
1 John 2:23 (HCSB)
23 No one who denies the Son can have the Father; he who confesses the Son has the Father as well.
The CORE of Mainline Christianity's Doctrinal Beliefs
The Inerrancy of the Inspired WORD of GOD in their original manuscripts.
The Doctrine of the Holy Trinity.
The Deity and Humanity of JESUS CHRIST.
The fallen state of man, is in need of Salvation.
The price for sin was paid for on the Cross by Jesus Christ.
The physical resurrection and ascension of Jesus Christ.
Christ will Come Again!
ETC., as I am sure there are other things we can all agree on.
Just in case you are thinking that is not so, because I have seen lots of people here on this site who do not believe in the Deity of Jesus Christ and deny the Doctrine of the Holy Trinity. Those denominations are not considered to be part of Mainline Christianity by Mainline Denominations, but are a psuedo-Christian Cult, such as the Jehovah Witnesses and Mormons. Mainline Christianity believes that the following verse is talking about the Deity of Jesus Christ.
1 John 2:23 (HCSB)
23 No one who denies the Son can have the Father; he who confesses the Son has the Father as well.
Many non-denominational Christians who claim that they follow no man-made doctrines, and their only doctrine is the bible, reject the trinity as unscriptural, with Biblical reference to support it.
The same often reject the deity of Jesus, and emphasize only the humanity, calling him a "man made strong."
Preterists do not believe that Christ will come again.
Again, what you call true christianity doesn't matter at all to those who disagree with you. Of the 78.4% of Americans who identify as Christian, mainline churches make up 18%. The majority of Christians might feel compeled to say they are tru christians, and the mainline churches are not. And the same would apply to them in that their saying so doesn't change anybody else's mind. Every single Christian thinks their doctine is the only true doctrine, whether you call them pseudo-christian or not.
All that aside, I don't think anybody is going to be voting on anything concerning the return of Christ or the truth of the trinity. It is the little things that christians disagree on that will affecct who they vote for and what they vote in favor of.