>"Muslim" Travel ban
Its a blanket policy on ALL travelers from a specific list drafted by Obama for a similar policy he too actually enacted. Muslims were not banned from say, the UK or Pakistan. It is also temporary. Even center leaning right-wingers have concerns about foreigners from unstable nations.
>Attempting to repeal the ACA
TrumpCare is almost Obamacare-lite, doesn't completely overhaul it, barely right-of-center, and to the more libertarian right-wingers, actually still a very liberal policy.
>Cracking down on illegal immigration
A solidly right-wing position, not an "extreme" one.
>Pulling out of the Paris climate agreement
Climate scientists think the Paris agreement is a joke, if we're basing your judgement of this on effectiveness towards combating climate change, even liberal politicians are guilty of being "extreme right" on this one.