Things have reached a point in Moperville in which people are ready to accept that SOMEONE killed a monster. It's just the part of who did it that's being doubted.
Reason 3
And here we have the third way The Legend of Diane title is appropriate, and the one that occurred to me as a result of reader criticism of Diane's hair.
Note: First is the flashback(s), second is tales of her smiting a giant snake with big pointy teeth.
Not ALL Dudes
This storyline is not going in a "curse all men who are dastardly by virtue of being men" direction. I figure there are at least a few people tempted to fling long rants at me at this point, especially after the first comic, but I assure you that will not be necessary.
Or, at least, wait and see where this all goes before flinging such rants.