- There were many times that Yisroel was struck by the wrath of G-D while in the desert.
- Dasan and Avirom were ring leaders in all those occasions, why weren't they killed until the incident with Korach?
- There are big people and small people a person can be big on the side of impurity also.
- Dason and Avorom were big people, big people don't get killed, their followers get killed.
- Even by them eventually they do something too big and slammed for it.
- This is why many evil people in history seemed invincable, surviving many assassination attempts where all others would have died.