Their behavior isn’t in line with your brand of Christianity, it very much is in line with theirs. Just because you think you and your church are the only actual Christians doesn’t make that the case.

And here I thought we were making progress when you said

You can call them fake Christians if you want I guess

Don't know why you're suddenly walking that back.

If you really didn’t like them, you’d just denounce them, straight up.

In what way is "They're not Christians" not a denouncement, straight up? It is literally, directly saying, "How they behave does not reflect what I understand Christianity to be in any way." How can a Christians denounce their behaviour more than by saying "I don't consider them to be Christian"?

Denounce: verb
publicly declare to be wrong or evil.

Publicly saying "They call themselves Christians and they are wrong" is the dictionary definition of denouncement.

You’re both Christian, this is a fact that you can’t weasel your way out of no matter how badly you wish you could.

What is the definition of Christian? If it's "anyone who claims to be Christian" then the definition is so broad as to be completely meaningless. "You're both Christian" is just as relevant as saying "your both American." So unless every American is responsible for the shitty behaviour of any other American, it makes no sense for every person who calls themselves a Christian to be responsible for the shitty behaviour of anyone else who calls themselves a Christian.

People are literally publicly saying "I do not agree with any of their beliefs or behaviours", what more would you have them say?