I'm new here, so you will forgive me if I only post on a few threads, and only reply to the first response to my post (if you feel you have an important point that is not covered you can reply to a later post)

Can you explain how there is a link between these killings and teaching evolution?

It seems relatively irrelevant to me.

Evolution is the change in hereditary traits in populations from generation to generation. (1)

Enjoy.

(1) - see this link for the university of michigan definition