I have an in-law family member who hero worships Charlie Kirk. He wears the T-shirt and has a Charlie Kirk sticker

[Doodley]

on the back of his car. What would you think of him, based on this, and how would you handle this situation?

[mahatmakanejeeves]

1. Civilly.

Age? Occupation? Education level? "In-law" meaning what?

Don't bring up the subject. If he does, you don't have to agree with him. You also don't have to get in a shouting match with him.

Before giving a response, ask yourself, "Is this how I want to be remembered?"

And good afternoon.

[underpants]

2. I'd just avoid the conversation if possible

You already know enough about them to know you don’t need to hear their view or opinion….mostly because it’s probably not really their own.

[dem4decades]

3. I'd just avoid him. I'd avoid him if he was a family member

Never mind an in law

[Ocelot II]

4. By ignoring it as much as possible. There's no point in getting into it with those people.

[RockRaven]

5. I would think they are a likely irredeemable shitbag, and

I would handle it by not wasting my time interacting with them when avoidable -- the payoff for being wrong on that knee-jerk assessment is not worth the headache that would come with being correct.

That is, as you note, solely based on that one fact you have shared, however, and in a non-hypothetical situation surely more than that one isolated fact would be known so this answer is necessarily of little real world usefulness.

[Norrrm]

6. Good advice so far.

[Dan]

7. I would not allow his influence around my children.

[Melon]

8. People believe different things

They are opinions. Does he tell you what to believe?

[sakabatou]

10. Avoid talking about Charlie

[The Wizard]

11. Bigotry is a negative character trait.