or am I to presume it is the usual Left tendency to attack the person when they have lost the factual argument

I've noticed that both sides tend to do this in pretty much equal amounts. And I've noticed also that both sides are just as likely to point it out in the other side, calling those on the other side hypocrite, while ignoring the same tendency in themselves.

We're all people. Labels are meaningless. The only purpose lables serve is to divide people in order to make them easier to control.