Would it not be better though to refute those allegations once, preferably with strong evidence, and then let others decide who is right?

The allegation was of twisting facts and ignorance.
Why put the onus on the victim to refute the allegations and prove the negative?

Why not demand that those making the allegations substantiate them, preferably with strong evidence and actual examples?

Even better, let them leave the thread to reasoned discussion and put all their personal attacks and name calling in a PM.
I would promise to read every word, before laughing at their pathetic inadequacy and deleting it all.