So, the article that was going around from the AP last week said that the GOP is going to support Trump because:
a) He is moderately intelligent and will be relatively easy to work with in a team. His personally held views have little to do with the things he is saying on the campaign trail, so he is unlikely to continue pushing for them were he to be elected.
b) He's a LOT less scary than Cruz, who IS a seasoned politician, and really DOES quite firmly hold highly objectionable views. He believes quite sincerely that women should not be able to access abortion and continually attacks Planned Parenthood, the only source of contraception for many women in the US. He is much less likely to work collaboratively with a moderate team.
c) The other moderate, relatively sensible candidates are refusing to back down, splitting the moderate vote between an unfeasibly large pool. Laughable as it might have seemed a year ago, Jeb Bush is actually a perfectly reasonable candidate. Moderate, experienced, bilingual etc. If the other candidates would sort themselves out and agree for one of them to step down in order to focus support on ONE moderate, the Trump thing wouldn't be an issue.
So yeah. I'm not that fussed about Trump. Deeply embarrassing for the US, of course, but I don't think that he actually holds any of these absurd hyper-conservative views. He is, at the end of the day, both urban and educated, two qualities which have little to do with the voters he is courting. He is highly unlikely to continue to champion their needs in office and is quite clearly playing to the crowd in order to maximise his chances of election. I don't think people in the UK necessarily appreciate the vast gulf between the urban/educated population of the US and the demographic that is supporting Trump.