Okay, well, if we insist on words having meanings, “genocide” is certainly one of those words loaded with meaning and legal context.
People throwing it around casually, and very often intentionally to get a reaction, should be called on to explain what they mean and why.
Saying you don’t care about definitions of “genocide” because you’re not remotely an expert, but taking pains to define the meaning of “zionist” seems intellectually dishonest, at the very least.