I find it genuinely frightening how convinced you seem to be that 1) you are part of the “right side” and 2) you have a mandate to decide the demarcation between right and wrong.
It is crucial to listen to and care for people who report problematic actions or words because, as was established before, false reports almost never occur. But it does not mean that those actions or words make their author actually guilty of something. Let’s not turn this into arbitrary trials.
I think it is more important that members of the community make sure they don’t tolerate any abusive behavior or comments, even when made “for fun”. Sexism and and racism is never acceptable, even more so in a professional and public environment. It is our individual and collective responsibility to stand up to that.