While this is true I'd also argue that it's oversimplified. With the alt-right pipeline being a thing across media (actually, right wing media in general is over represented, and
this video explains it pretty well), I think most people vote for his views on islam not because they're inherently bad people, but
because they've been groomed into that ideology. People who subscribed to those views to begin with (eg. literal neo-nazis) tend to constitute such a small (albeit loud) minority in most countries that populist parties would most likely never be able to get a
seat in parliament, let alone win elections. For example Brexit would've probably never happened if the nutjobs alone voted leave, nor would Trump get even remotely close to any of the support he's
still enjoying by a fair share of the population.