They dont hate 2A. They refuse to sponsor people who promote politicized content (and fearmongering, since this came immediately after his ammo Armageddon clickbait). MrGG (and not the cool kind like bendy Bill makes) is a clickbait caricature of old school conservative views, only he doesn't seem the get the 'joke'. The majority of his audience is the fudd-base that gets mocked everywhere, everyday for having antiquated and inappropriate perspectives on both people and politics.

This is just reinforced by his fans (like you) posting saying "they hate 2a" when even the actual video producer says WHY they terminated their sponsorship of the channel.