Is experimental music inherently leftist music? If so, what makes it so? Can anyone name a right-wing experimental musician? No, Zappa doesn't count. (I suppose Italian futurists would count, but that was over a century ago)
Death in June, Ariel Pink maybe? Depends on what you consider experimental.
A large part of the noise/industrial scene is right wing. For an article from the early 2000s about this, look up "Apoliteic music: Neo-folk, martial industrial and 'metapolitical fascism'"
everything good is left-wing. left wing is synonymous with good. bad things are right wing. this stems from the sun rising in the west (left) and setting in the east (right).