That's just you overreacting and misrepresenting. God preserves His own...Philippians 1:6. When a child of God sins, God exercises discipline to draw His people again to Himself...Hebrews 12:6. Those who forsake God were never His own...1 John 2:19.
Sadly lots of people these days follow false grace
Here's God's definition of what grace actually is:
Titus 2:11,12
For the grace of God that bringeth salvation hath appeared to all men,
Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
Define "turn away." Is it a specific number of sins or frequency? - - - How long does that cleansing last?
God meant what He said and said what He meant.
Those wanting to know how many times they can sin before they disqualify themselves have already missed the boat.
That's too bad for those who are luke warm wanting to be saved and still enjoy sinful behavior at the same time
Jesus said He would force those that are luke warm out of His Body
Revelation 3:16 - So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.
2 Timothy 2:12 - If we deny Him, He also will deny us
We reap what we sow so if a person turns way from the Lord they are denied by the Lord.