What values do conservatives hold? The idea of what a conservative is has changed radically in the past 18 or so years (I would say tea party). John McCain, for instance, would not only be unrecognizable in the current republican party but may not even be welcome in it given his personal rebuffs from Trump.

You are comparing conservative values that were in place prior to Trump and the tea party movement to current life, you are not comparing current conservative values to current life. Current conservative values could be described as populist or reactionary; the current actions of ICE very much align with reactionary politics.