Please show where the Bible states that you must support slavery to enter heaven.

I don’t see how that’s relevant to the conversation

I am quite certain that the churches I’m talking about are adamantly against slavery.

Yup. A lot of churches have the stance of “love thy neighbor. Did I fucking stutter?” and it’s very refreshing after decades of nonstop hate. Not saying the hate isn’t still out there, but we’ve come a long way even in the past 10 years.