Joseph, I do not think this is a practical question. But rather, by asking this, it is an emotionally cathartic way of expressing your disapproval of others. By excluding your children from having friendships with such people (and yourself by proxy) you are validating your own beliefs by essentially saying “your kids are not good enough to play with my kids”.
Why not just say “I hate your opinions and consider them so toxic I won’t even let me kids play with your kids.” Instead of asking it as a question?