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.
“How does that logic hold up?” If you really didn’t like them, you’d just denounce them, straight up. You wouldn’t be so desperate to make sure we know that not only are they shitty, but you specifically have nothing to do with them in any way. 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. Continuing to pretend otherwise turns your denouncement into hollow self praise.
If you don’t have anything new to contribute besides flapping your arms harder about how they’re not really Christian, I’m done replying. I hope you get better at actually, meaningfully opposing the evil parts of your religion instead of simply distancing yourself from them