Alot of churches are wanting to unite right now under a common banner and that is a major problem. Mostly because they will accept each others heresy and witchcraft at the same time and just practice mystery religion together rather than actual Christianity.

One must make sure the other is actually sound biblically before yoking up with them.

Its one thing to overlook stuff like whether or not they think you have to take communion or do water baptism or (insert mundane tradition). It's another thing to yolk up to the circus of people who think they can release a God to do stuff, or declare and decree things into existence, or a man is a vicar of Christ, or whatever other nonsense is out there.

That is the major challenge today as I would wager most churches are pretty deeply compromised or at the very least unwilling to budge from tradition.