https://en.m.wikipedia.org/wiki/Gish_gallop
Generally, it is more difficult to use the Gish gallop in a structured debate than a free-form one.
This sums it up nicely, and why I think he’s like any bully: he picks his fights and only ones he can win.
I firmly believe you have identified the correct answer.
A lot of other song suggestions in this thread are actually decent and come down to taste, but this fucking song came to mind immediately.