Which is a technical and a free throw. No problem.
Which means the problem actually started when the Kansas State team.emptied their bench and charged onto the court to initiate contact with players who were playing the game.
You can take a "I hate KU, they deserve it" approach all you want but that was when the incident went from "fouls committed on the floor by players playing in the game" to "a problem".
One of the worst things you do in sports is stand over someone and taunt.
If you sack a QB on the football field and stand over them doing a sack dance you are going to get drilled. Now if you go celebrate away from the QB nothing happens. Right?
If you admire a home run too long more or less taunting the pitcher you are going to get beaned next time around.
You run the bases and do all kinds of celebration after crossing home nothing will happen.
See the pattern here.
Why did he stand over him and taunt?
Just accept the fact that KU player chose to elevate the situation, thus soliciting a reaction from KSU.
In the end DeSousa will pay the biggest price for starting this. Other guys on both sides will pay for contributing to it.