I think you are dissecting ants because you will find fault in everything Clemson says or does.
The "chokehold"
Jackson was trying to gain more yards; BB was trying to stop him. During the pace of the game, the defense will grab what ever they can to prevent more yards. Sometimes, you grab the facemask, the collar or even around the neck. Most of the time you don't realize it because everything happens so fast. Now, I do think BB realized he had him around the neck when the play was over and held on after the whistle or got a quick squeeze and LJ didn't like it. Probably could have been a personal foul if the referee saw it. But it is no different than the pushing and shoving or trash talking that goes on. For example, when a player is trying to make a tackle and inadvertently grabs the facemask and turns the helmet around. Typically it is not grabbed on purpose, but they typically don't let go because it happens so fast. Or when a defense players gets pissed off because he is blocked until the whistle when the play is on the other side of the field.
The "racial slurs"
BAW specifically said it was a white OL. But he didn't know his name, number or what he looked like, yet CU only has 3 while OL. It's unfortunate if it happened, but I don't buy this story for one sec. Do you really think black players on CU's team would be OK with a white teammate using that word even if directed to the opponent? I think the story was made up in the heat of the moment from the loss or that it was the black players using the word. The fact that the story dies out after a day or two speaks volumes.
The "nut grab"
There is no excuse for this. Unfortunately, eye poking, spitting in the face, nut grabbing, punching etc goes on in the bottom of piles. I guess it is done to get a mental advantage. Doesn't make it right, but it happens. Wilkins landed his hand on the opponents ass and in a split second thought he could sneak a nut squeeze and it look inadvertent. Instead he did it out in the open and got busted. Kids do stupid things and this was stupid. If you think other teams (including SC) don't do this too, you're dead wrong. But to say it constitutes a culture being fostered by the coaches is not accurate. It's the culture of football, but maybe it's an issue that needs to be addressed, especially in the day of more and more sexual assault.