it's just disingenuous to expect sanders supporters to concede that the difference between trump and clinton is that great. all the language thrown around treats it as an assumption - or something so obvious that it doesn't need to be demonstrated. the basis of the push back is just simply that the case has not been made. hillary supporters are going to have to actually make that case: they are going to have to convince these people that hilllary is measurably better than trump.
it's not obvious. and you do have to make that argument.