I interpret that behaviour as sarcastic criticism of our own team, if you get my meaning.
I recall one guy at Starks Park last year shouting constantly about a glaring weakness in our defence, which was exposed time and again. Nothing was done by SH to correct it and when Raith eventually scored because of it he clapped them and shouted something like "Well done, who didn't see that coming?". Sheer frustration.
Yes, it looks and sounds bad but folk show disappointment and frustration in different ways.