Well first of all, right wing ideology contains much much more things than just free-market and opposition to government intervention. That's just picking out the things you like about it

And a lot of times different right-wing movements contradict each other on many points, even though they're clearly all right wing (like Trump and Ron Paul for example).
So if we're going deep into this discussion, a simple left-right spectrum doesn't really make sense imo. What PI was referring to was an exceptionally ignorant post by Zach a few weeks ago where he claimed that the right wing in the US works works with objective truth, which is of course a load of BS. Also, if you like it or not, islamophobia and war-mongering is definitely a phenomenon of the right wing as a whole. Free market and opposition to trade barriers are too, but I still don't see how this is relevant to this discussion here at all.
Oh, and on this part:
The problem here is that Friedman's model leaves out a lot of variables and context. In his simple model, trade barriers are logically damaging. In reality, there are a lot of cases where reality resembles that model close enough as to make the recommendations of the model sensible. But there are also quite a few situations where countries and their people are a lot better off with trade barriers.
Trusting simplistic models and their predictions too much is the great fallacy of economists.
But again, that discussion shouldn't really have any place here