On a less important note, re the argument being at a level of "how could you vote for someone who said that". That may not be people refusing to engage with what you see as the important points, but them focusing on what they see as the most important points. That doesn't make it right but if it is the case you may do well to understand their point of view holds that someone with his behaviour and character can't be trusted with power, they may see everything else as somewhat irrelevant. If that is the case at least understanding it may help you frame the discussion with such people, and hopefully not dismiss their arguments as petty since they think they are the most important points.
Anyway, aside complete. Let's hear the rationale for being a Trump supporter, I would be genuinely interested to hear it even if I may ultimately disagree.