That is not a simple question to answer. The denominations have given themselves over to false teachers and false doctrine. They practice the practices of false teachers by merchandising people. On the other hand, we must not give up meeting together as some are in the habit of doing, as it says in Hebrews. And a third dimension to this is that we are to have nothing to do with someone who calls himself a brother, yet continues to sin:

11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat. 12 For what have I to do to judge them also that are without? do not ye judge them that are within? 13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person. [1 Corinthians 5 KJV]

And if you are this kind of brother then you must stop these things. Then seek out fellowship with those who do not follow false doctrines. You know what those false doctrines are if you have watched my videos. Does this help clear this issue up?

Questions to Ask Another Believer Before Fellowshipping with Them

  1. Is Jesus really the Son of God?
  2. Did Jesus really die on the Cross?
  3. Did Jesus really, physically raise from among the dead?
  4. Why did Jesus die?
  5. How is a Christian saved and what is he saved from?
  6. Were you baptized in water with a commitment to God that you will stop sinning?
  7. Do you sin?
  8. What is the purpose of meeting together as believers?

If he answers from the false doctrines choking the Church today, then do not keep company with him. If on #4 he talks all about atonement and substitution, taking our place, but says nothing of freeing us from the power sin had over us, then he may be deficient in his knowledge of Scripture. If on #5 he says we are saved from sin and death, then ask him when are we free from having to obey sin? If he says we will never be free from it in this life, but only in the next, then he believes false doctrine. If on #6 he says yes, then ask #7 right away. If he says he sins and that all people must sin because of sin nature, then you’ve got him. He has admitted to breaking the promise on which his own baptism rests. But it is much worse. He justifies breaking that commitment and justifies his continuance of breaking it. If you have gotten this far and he has indeed answered everything according to Scripture, he may still not understand #8. If he gets #8 wrong he may only need to be taught Scripture, but he may also have another spirit driving him than the Spirit of God. This would be very difficult to discern. These questions will help you identify the people not to trust who call themselves Christians. You will see the ones who really believe and want to follow Christ, but just have been fed on false doctrines. They might be saved, but do not trust yourself to them in fellowship until they have changed to conform to the teachings of our blessed Lord, Jesus Christ.