There's nothing quite like people's intolerance to opposing views on, especially, politics and religion to spark comments we wouldn't normally make in the course of a face to face conversation but there is one aspect of the argument I would like to comment on.
I don't think it is at all creepy for an adult to recognise that a chid is 'pretty' (or handsome, were it a boy). I've often heard the phrase, "(S)he is going to break hearts when (s)he is older." It's a compliment parents are often happy to hear said about their child. I don't think anybody making that kind of comment is harbouring untoward intentions.
Given Trump's history where women/girls are concerned and the company he's known to have kept, though, it isn't much of a stretch of the imagination to worry about what might be on his mind.