I Would like to share an insight I saw many years ago from Rav Yonnason Eibeshetz Zt”l.
The torah says that shimon and levi killed the pepole of shechem when they were weak on the third day after they had a bris.
Asks R’ Yonnason why did they have to wait till the pepole of shechem after they had a bris, it is explained in the medrash that the whole country of egypt were terrified when the shevatim came there, so why did they wait to kill the city of shechem until after they had a bris.
The answer is, if you kill a non jew the whole world will uproar, so they waited till they had a bris, and then considerd jews, then killed them, and the world silenced…