So, a lot of Americans think that if they ban incitement to hatred based on sex, race, and religion than they have to ban communists, republicans, and democrats

So, a lot of Americans think that if they ban incitement to hatred based on sex, race, and religion than they have to ban communists, republicans, and democrats in a few years. I really don't get how is it related. Especially if it didn't happen in other countries.