I think the argument would be more along the lines of: "You're calling this Yoga, but here is what Yoga has meant historically in my culture, which is actually quite different." I think the types of behaviors people attribute to PC nazis or similar are understandable responses by groups of people who are usually ignored by the mainstream so they raise a stink (read: pay attention to us or else!). Conversely putting people into that box usually comes from groups who are (like myself) historically highly empowered and have the luxury of intellectualizing things that are more in the corporeal/emotional realm for the groups they're critiquing (ie. stereotyping, mockery, physical abuse). I think fairness and justice are highly subjective and can only be gleaned by carful consideration of both sides, which is to say understanding why they have their "feelings" and why you don't care about them.