I'd actually say that Trump's stance on immigration, while of dire importance, is actually a secondary reason for my support of him. I support Trump because of who he is, what he does, how he acts, and what it would mean culturally to have someone like him in the presidency. Trump has, in his short run for the presidency, done more to benefit the culture than eight years of George W Bush ever did, or ever could.
He has done serious harm to the idea that the smart thing, the strategic thing, and ultimately the only thing to do in the face of political correctness is to submit to it in one way or the other. And he did it without so much as passing a law.
Breitbart has a saying: Politics is downstream from culture. I would rather impact the culture in a positive way while throwing caution to the wind with legislation, rather than bolster a culture I hate while 'shrewdly' sneaking in legislation I somewhat regard as positive.