Always amazing watching these all or nothing debates, as everyone rushes to put outside political perspective that fits their point of view around human interactions.
I'll make this simple for you. In 2021, should anyone not a parent lay hands on another human being for any reason? No, they shouldn't. On the other hand, at times of stress is it an awful moral failing for someone in the heat of the moment to touch someone in a manner that is absolutely not meant to cause actual physical harm? No, it's not that either.
For the protection of MSU, if nothing else, Izzo should be told not to do it again. Bosses and supervisors who aren't coaches have to learn all over the country that they need to find ways to get their points across to their charges without touching them. But the fate of western civilization doesn't depend on whether before a basketball coach (or a supermarket supervisor or a partner at a law firm) starts yelling at someone they are supervising, he or she puts a hand on his shoulder to get his attention, or even tugs at his shirt.