Being anti-establishment and being pro-liberty are not the same thing. The Bolsheviks were anti-establishment when they made war against the Russian political structure, and only retarded people would assert that the Bolsheviks were in any way supporters of liberty, especially after they'd gained power.
Trump is anti-establishment in the sense that he is fighting an established power (Neocons/RNC), he is not, however, our ally and is not a friend of the policies that most on this forum support, including myself on most issues. I'm not supporting him, though I think there is a theoretical argument that his destructive approach to dealing with the GOP's Neocon wing might be beneficial in the long-term, though as president he will likely do some damage (as all of the remaining candidates will to varying extents).