You realize that coyotes have attacked and killed a fair number of dogs and attacked more than a few humans right? Cats are a particular favorite snack of coyotes but I have trouble holding that against them.
I have read that up to 50% of the diet of some urban coyotes are cats and dogs, but not nearly so much in the country as there are lots of other options. As far as killing humans, there are only TWO TOTAL confirmed reports of coyotes attacking and killing a human in all of Canada OR the United States EVER (one was in Canada, and one was in the US - there is an on-line documentary about the Canadian killing, and it is a very good film). Compare that with the CDC report that shows 20-30 humans are attacked and killed EVERY YEAR in the US by dogs.