I've not seen many comments about Trump's appearance, but I have seen a number about his views, and I can understand people, especially those living in America, being frightened. You have someone who makes the horrific comments he has made who is then elected president - which shows that those who voted for him either agree with those views (e.g. it's ok to sexually assault women) or don't see them as wrong enough to disqualify him as their nation's leader.
As for not affecting those of us outside the US, bearing in mind he is regular referred to as now being the 'most powerful man in the world', I think it affects EVERYONE.