Hi Reniaa
You said:
courageous but not biblical, you were right in one respect difference of opinion biblically is allowed but it is what you do with that difference that makes you apostate.
Romans 16:17
I urge you, brothers, to watch out for those who cause divisions and put obstacles in your way that are contrary to the teaching you have learned. Keep away from them.
Good scriptures however you have to take the context into account. Why would Paul even mention cause divisions? Because he didn't want to see the church break into sects. So Cognac saying that an apostate is someone who tries to have people follow them she is actually correct, that's what an apostate is someone who disagrees but ALSO tries to get people to follow their line of thinking.
Simple disagreeing does not make an apostate.
1 Corinthians 1:10
I appeal to you, brothers, in the name of our Lord Jesus Christ, that all of you agree with one another so that there may be no divisions among you and that you may be perfectly united in mind and thought.
Philippians 4:2
I plead with Euodia and I plead with Syntyche to agree with each other in the Lord.