As for the rest of your question, you should look to see what Doug Peacock has written about Abbey (Peacock was Hayduke in The Monkeywrench Gang.) They were close friends for a very long time.

Regarding a similarity to Trump vis-à-vis anti-immigrant postures, I have to think that Abbey would be appalled by "reality television" (if he watched television at all) and its ilk. It's as fake as WWE/F wrestling - Abbey was a critical thinker, Trump is not. Whatever opinions they held in common, the contrast in their mental acuity would instantly be apparent. And I think some of Abbey's political stances were to get up people's noses, but if it comes down to the two of them standing in the same room speaking, the difference would be clear. I won't speak for his politics, but in life he didn't suffer fools gladly. So why would he tolerate Trump now?