Some people like to claim they are above all "-isms". They take pride in this claim, and may even believe it. They are fooling themselves.
"-ism" is simply "a productive suffix in the formation of nouns denoting action or practice, state or condition, principles, doctrines, a usage or characteristic, devotion or adherence, etc. "
So those who say they reject all "-isms" would like you to believe they take no actions, have no principles, etc. They "do" nothing based on anything? Don't be ridiculous.
What are they afraid of?
Sure, there are many really disgusting "-isms". Ignorant ones based on horrific beliefs. But to pretend to be above them all is delusional. If nothing else those who pretend this are devoted to "antiismism". That's got to be one of the oddest "-isms" there is.
Don't run from "-isms", but choose wisely. There are good ones and bad ones-- learn to tell them apart. It's really not that hard to do.
