Because I have no desire to use personal insults and weaken my position , and therefore my whole argument.
I agree that emotional, personal insulting is a bit of a waste of time. But if you have a solid argument, it cannot be weakened, even by adding insults to the mix.
However, I don't believe the women here have been particularly insulting. The behaviour displayed by this person is perfectly described by the use of words such as thug, vile, etc. They are pertinent words, germane, relevant, appropriate.
Perhaps you find the strength of feeling uncomfortable? Or, more likely, the unvarnished expression of that strength of feeling.