Like I've said before on here, I'm in the UK so I won't pretend to know enough about Trump to say if he'll be a decent president or not, all we get over here to go off is the media coverage and to say it isn't favorable for Trump would be an understatement. There are similarities though it seems between him and Nigel Farage, and while they do both come out with statements that probably can't be backed up, they do seems to represent an ever increasing voice.
While there are calls that they are right wing and racist, Farage for example managed to get over 17 million voters to vote leave in the Brexit referendum, me being one of them, so to think that Tump won't be a decent opposition for Clinton, might be doing him a bit of a dis-service.