I would be concerned about them telling him he was disgusting for wetting his pants...

The other stuff...probably not - the teacher stepped in promptly when he was having issues not much else they can do - boys are boys and toddlers hit lol I have this problem with Charlotte and she is only 18 months

But I would probably make a point of discussing how they approach the wetting situation with the co-ordinator, see what her response is and keep an eye on it.
Most of all talk to Tariq and make sure he understands that he is not disgusting and that if he does have an accident he needs to let his teachers know so they can help him.

Good luck!