I think only parts of Nusech are really traditional Jewish music. Most of the rest has strong influence from the non-jewish world.
I find the idea of being anti both non-Jewish music and its influence on the Jewish music scene as coming from a view that anything non-Jewish is bad. True that sometimes the words are highly inappropriate but most of the time you can’t even hear the words.
Personally, I find a lot of Jewish music uninteresting and monotones with a few exceptions.