Agree with the point on the members, this shouldn't be happening. Has Khawaja reported reported racial abuse? If he has, they should faces criminal charges.
In terms of it being nothing like mankadding, I actually think it does compare. It's obviously in the rules but for me Bairstow was clearly not looking to gain any advantage at any point, or batting out of his crease even. Similar to a cheap mankadding if someone barely leaves their crease after the bowler has paused massively. It's not cheating, just a bit poor all round for me but it will always divide opinion. If the shoe was on the other foot, I'd guess it would be different. Much like the Starc catch, where England fans will say not out and Aussies will say out, as most have in the comments I've seen on socials.
Either way, we really only have ourselves to blame for being 2 down. We've been in good positions and not taken advantage for various reasons, mainly due to some poor cricket and decision making.