'2A4ALL' is a fig leaf that Karl uses to deflect from the fact that he specifically started positioning himself as a radical leftist, collaborating with radical leftists. While the Tacticool GF videos got him some mockery for sucking transsexual penis, the main criticism was that TGF is an actual Antifa member, the sort who does actually go and do real-deal anarchist shit.
Karl knows that's pretty hard to defend even to a normie audience, let alone the right-wing types who typically watch gun channels and make up the overall firearms community. So he's been trying to cloak it in the language of equality, as though any criticism is about the race/sexual orientation/gender identity and not political viewpoints.
If he simply wanted to reach out to LGBT people, he could have worked with Erin 'Erin Sith' Smith, whom he has worked with in the past and has some links with both him and Ian.
Erin is the transwoman on the right in this video from some years back. Erin, while not really a Youtuber, still has a longstanding presence in the firearms and training community in the west/southwest. Someone who would be ideal for representing a nontraditional gun enthusiast.
But he didn't ask Erin to get involved, because he was specifically looking to work with a communist or an anarchist or some other flavor of leftist, and Erin is very right-wing. So he specifically contacted a leftist transsexual, and then used TGFs gender identity as a shield when he took flak for promoting commies. If he were just doing outreach to people less represented in firearms ownership he probably would have taken some ribbing, but he's straight up trying to get the people who hate America to take up arms.