I might downvote you for that, yes - if you said you were worried that people voting for politicians would facilitate the spread of terrorism in Europe, that would be an entirely understandable point of view.

The fear of Trump is based on what we've learned from history: charismatic leaders, sowing discord and tension, talking about building walls to separate and contain people, trying to rid a country of certain races and religions, have caused the utmost tragedy in recent times. Trump is the one injecting US presidential campaign bullshit into this issue, and that must be countered.