I have to say, I can understand Red's post.
I have a problem with some "Christian" religions because the bible says do not add or subtract from God's word (the bible) yet there are certain types of "Christian" religions that do add to or subtract from the Word of God.
Here are the scriptures to back up what I am saying.
Do not alter (delete or add to) God's Word "You shall not add to the word which I command you, nor take from it, that you may keep the commandments of the Lord your God which I command you." Deuteronomy 4:2
"...if anyone preaches any other gospel to you than what you have received, let him be accursed. For do I now persuade men, or God? Or do I seek to please men? For if I still pleased men, I would not be a bondservant of Christ." Galatians 1:9-10
"For if he who comes preaches another Jesus whom we have not preached, or if you receive a different spirit which you have not received, or a different gospel which you have not accepted, you may well put up with it!" 2 Corinthians 11:4 [I.e. don't tolerate heresy]
"Whatever I command you, be careful to observe it; you shall not add to it nor take away from it." Deuteronomy 12:32
"Every word of God is pure; He is a shield to those who put their trust in Him. Do not add to His words, lest He rebuke you, and you be found a liar." Proverbs 30:5-6
"If anyone adds to these things, God will add to him the plagues that are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book." Revelation 22:18-19