You can think someone’s take is terrible and still talk to them like a person.

Disagreement and contempt travel together so often that they start to feel like one thing. Pulling them apart lets you argue hard about an idea while leaving the person intact, which is the only condition under which anyone has ever changed their mind. Treating someone decently is not agreement with them. It is the baseline that makes real disagreement possible.

In your next argument, take on the strongest version of what they said rather than the worst. Keep the language aimed at the position and off the person. You can hold your ground and still be someone people can talk to.