Don’t cut off contacts unless absolutely necessary.
I did it for years, and now I’m living again; I have access to events too, simply because I’m now on WhatsApp and Discord. It’s a shame, but that’s how it is. But you can control what you decide to say, and make a physical appointment and then share IRL.
If you choose to boycott, the big risk is standing alone and just arming yourself, as you mentioned.
I think you already know the answer.
Joining a militant network is another way to find people who share your concerns, but you will have to search for them, and that can require a significant effort. But you will have new friends, and make your socials, bigger. Thats a good thing.
You will have many networks, separated.
I don’t know what else to say.
Kids killing > Mass murdering
HealthCare > Mass deaths