edit: Unless you actually believe that the only piece of information required to deport someone is that they are of Mexican ethnicity? That's provably, laughably false - but that might be the point you were trying to make?
Obama was able to do it in 2008 and 2012 because he was an _amazing_ statesman. It's my personal belief that we may not see another person as skilled in public speaking/appeasing the public again in our lifetime. I supported him both times despite my personal belief that he did not move the Overton Window very far in either direction.
What I do recommend is to take your more extreme rhetoric and see if it can be applied to your own positions (in many cases it can, in some it cannot) and try to determine for yourself if you are falling trap to 'regurgitated rhetoric' or legitimately offering critical thinking.
tldr; You persuade no one by taking a theistic approach to reason and perhaps alienate more than you convert.
I actually believe, because there is ample evidence to support it, that this administration's goal is ethnic cleansing via mass deportations, immigration controls, and mass incarceration.
I believe anybody who is ignoring this evidence, and anybody who is able to compartmentalize the grave, mortal danger that members of targeted minority groups now find themselves in as "just politics", actually does not consider those targeted minority groups as fully human.
For whatever reason, you think that's so extreme that I couldn't possibly actually believe it. But I'm being really straightforward. That's what I believe. There's ample evidence to back up those beliefs. I don't care if I alienate some people by saying what I believe is true.
Trump's mass deportation machine is ramping up now. I and thousands of others have trained to intervene directly in deportations, and those networks have already been mobilized to prevent people from being kidnapped from their own homes. That's the base I'm interested in building. And conveying anything less than the full scale of the terror that targeted minority groups are facing, or asking for anything less than the assistance they are calling for, is a mistake.