If Hitler would have gone to university ( and BTW' the guy that refused his admission to the university was juish - a fun fact i learn earlier), do you think he wouldnt have joined the army, wouldnt have gone to WW1, and wouldnt have continued as to start WW2?

It likely would have made no difference. By the time Hitler was called up Germany was taking everyone in sight into their army. Horrendous casualities you know.
As for "starting" WW 2, it was more Hitler's time in the military than at the university that gave him his political views. Better that he be shot and killed on the battlefield in WW 1 (which almost happened as I recall).