Any idea what this is about?

From the clueless Gun Guys:

 It’s not like we ever took anything CCRKBA said seriously (after all, it is run by Alan “Tina” Gottlieb)…

“Tina”?  A play on “tiny” because Alan is rather short?

Probably it’s because they can’t think of anything factual or rational to say about the CCRKBA.  They have to resort to name calling to make themselves feel better.