This precise argument can also be made to justify a tightening on immigration from countries where religious intolerance is the cultural norm, on the grounds that “if you allow [them] to spread their ideology eventually there will be enough [of them] to be able to take the power by force, and when they do they’ll setback all of the tolerance that was advanced”. Reasonable?
That’s a specific case that doesn’t falsify my claim that most people in this discussion, here, are inflating away the meaning of the word Nazi so that it equates to, roughly, “somebody I don’t like who is to the right of me politically”.