Of course you're downvoted, but this is absolutely the most accurate response here.

I'm not saying OP is lying, but I'm not so ignorant as to believe she's telling the whole story. I'm sure she thinks her and her husband are completely in the right, obviously her in-laws don't feel that way and I'd bet they'd recount the incident differently.

The reality is, if you take the political words out of this post that color the responses she's getting, it becomes very apparent that her husband insulted his parents and then told them to suck it up because they're wrong and idiots. Like, fuck off with that bullshit. I'd leave too. Now, she's just trying to add salt to the wound.

People are trying to say, "You didn't cut them off, they cut themselves off." Well, no. If they're choosing (as a couple) to insult and belittle the in-laws and deny them access unless they respond in a way OP finds appropriate, she's the one cutting people out of their lives. By all means, do. But don't try to call it something other than what it is.

And over political opinions? Pathetic and boring. Find a better reason to distance your children from their grandparents. This whole "everything is politically charged, you must have a strong opinion on everything, and you must show your support or opposition in extreme ways" bullshit... it's really tired. Hope her kids not having grandparents is worth it. At least husband gets to feel like he "won."