Stock up on ammo, make sure my guns are in working order, and then sit at home watching the news/listening to the radio and hoping that I don’t actually have to use them. I’m “multi-ethnic” but look white, but also have a non-European last name. I have had to deal with white supremacists before, who assume I’m white, so probably nothing to worry about. Then again, a lot of racists hate “race-traitors” worst of all, so perhaps my association with radical anti-racism might make me a target. I’d mostly be worried that they or someone else would start something that got out of hand. So basically like every other day but with a bit more attention.
Other than that, I think trying to stop them by some legal means (petitions, trying to get the town to revoke permits or somesuch) would only cause a lot of trouble with little reward, and perhaps in some way give legitimacy to their twisted beliefs in the eyes of the public, were they to take advantage of the PR.
@Aesthetic_Mess I second @Nullo on the AK if you have the cash. And I am an AK fan: they’re cheap, shoot well enough, frightening, and hard to damage. I was thinking of saving up for a second one for my partner. A plain old pump action 12 ga might be easier, or at least cheaper. Mossbergs are good for that.