Kimmel didn't make light of Kirk's death, he made a joke criticizing Trump for making light of his death.
If the conservatives were really angry about people not mourning Kirk's death, they'd approve of what Kimmel said.
Kimmel was basically taken off the air for the closest thing to a right-wing joke he's ever made.
Be funny as hell if people started using the I'm-mad-people-aren't-sad-about-kirk snitch lines to report the POSPOTUS for making light of his death.