[r9etb]

Or do you not know that the saints will judge the world?

Proof texting is an ugly thing. For example, that quote from 2 Corinthians has the misfortune of seeming to contradict Jesus' own words in, say, Matt. 7:1-3. The secret to untangling that mess is to understand the context.

God alone knows our relationship with Him -- it is not for us to judge that.

[PAR35]

A church that doesn’t practice church discipline will soon slip into apostasy.

If you let anything go because you don't want to 'judge', you will eventually end up where the ECUSA, PCUSA, UCC, and other mainline groups have found themselves.