They definitely don’t understand, but more importantly it doesn’t matter either way - having a group they can persecute is just how they reinforce in-group ties. They lack a coherent ideology, and simply bond over cruelty. Any hatred that can safely be stoked will suffice for such people. Every time we accept an out-group into normal society, platform and protect them, they find new prey. Whenever we give up ground and let peoples rights get taken away, the ‘far right’ go back to hating them too. Cruelty is the point, and it’s what turns them on. That’s what makes them ‘far right’, is that it’s obvious compared to normal conservatives.