Most controversial (if not plain repulsive) band I’ve covered here was Empire Falls -the white supremist band.
And there was that Al Quada band from 2009… remember them?
Anyway, brooklynvegan has an excellent post up about anarchist English Anti-American bands who played Baltimore (? -the post is a touch obscure).
Begging an answer to the question why Rot In Hell can get a visa to the States and Yuck can’t!
http://www.brooklynvegan.com/archives/2011/01/a389_2011_in_pi.html#more