Blocked by in-laws because *we're* in an echo chamber

My husband's mom and brother both inexplicably voted for Trump this time, despite voting Democrat for as long as I've known them. His brother has some mental health issues and also has a special interest in home steading and "living off the land", while his mom has never had a job that paid more than $9 an hour and is upset that her life is becoming smaller and more unaffordable by the day. So they're both pretty vulnerable to conservative propaganda.

My husband let them know that their actions and newfound beliefs hurt us very much and will have consequences for our immediate future and our children's future, but didn't call them names or say we were done with them. He just said we needed some time to cool off and think about things before we try to work it out. His brother flipped out and accused us of all kinds of stuff like hating his kid and living in an echo chamber where we would die alone because we want to control everyone around us. His mom tried to reach out a few times but got angry when my husband said he wasn't ready to move past it yet. They both blocked our numbers and our social media.

Of course it was hurtful to hear these things, but it just isn't true. We've both had to end a few relationships with racist, sexist conservatives in our lives – but we still have a wonderful network of friends and family we love very much. The people closest to being alone due to their beliefs are my MIL and BIL, who live very isolated lives in the midwest.

Both of my parents are full on white supremacists, so I've long made peace with going no contact with lunatics – but my husband is really struggling with this subtler and more recent slide to the right from his family. I don't know if there's anything to be done since they're the ones pushing us away but it just makes me really sad.