Unfortunately we can't condense 75years of modern Israeli/Palestinian history into a 2 panel Simpsons meme to explain that, yes Krusty Burglar is evil but Homer had previously committed several atrocities of his own including the rape and murder of The Burglar's family and is now throwing grenades into the audience because they didn't do enough to stop the Burglar.

But this is justified by the Simpson's religious/cultural beliefs, themselves formed in response to violence and trauma committed by others, and funded by the religious fanaticism of the Flanders family who believe the Burgler has to die to usher in the end times.