I grew up more accepting of both sides. Dad's COGIC and Mom's Apostolic. My dad has preached at her home church and other churches, and her cousin who is a pastor has preached at our church. My dad says he learned early on that if you go into a bible believing church and preach the bible and stay away from your opinion or your doctrine, you will never have a problem. And he never did.
So if I believe in one God who is triune in nature (like I am btw, body soul and spirit), instead of throwing around words like "Trinity", etc. I can preach from any scripture in the bible, even if it mentions Father, Son and Holy Ghost, and people who believe the bible will say "Amen", be blessed, maybe even shout. But if I go in there talking about what my doctrine says about those scriptures or where I perceive their doctrine as flawed, we're going to have some issues.
Ultimately, God is one and the only thing that unites our crazy differences is that we love him, serve him, and have his spirit on the inside. Without that, it'll be all out war.