BS: How is it that as soon as these “evil” people entered the Beis Midrash so much good came about becaues of them? They were obviously not evil. Evil people cause the shechinah to leave, not Give and Teach them much more.
Rabbon Gamliel wanted them to learn elswhere, in other Botei Midrash, perffect themselves there and then enter. Isn’t that similar to the practice of many Yeshivos for older bochurim, that one needs a certain level before being admitted.