I agree...and you thoughts seem to be similar to mine.
All these animals can and do interbreed with dogs and each other. Because dogs tend to outnumber the wild canids, and lots of dogs escape from their owners, then interbreeding with each other, they are all closely related. There is no DNA test that can tell whether my dog is descended fror the wolves at the zoo, or visa versa.
While I can't completely go along with the anti-evolution crowd, they are right to point out the slimness of the clues the evolutionary DNA experts work with. It just seems to me that the serious dog folks don't like the idea their pets are descended from scavengers, even though it is so obvious today's dogs prefer scavenging to hunting. So they grab onto any feeble evidence that their favorites are descended from the noble wolf. Likewise, they insist, without significant evidence, that dog breeding is responsible for the domestication of dogs, because it adds nobility to their own efforts. As if prehistoric man, living in the Hobbsian struggle of all against all, could possibly stick to a 100 or 200 year breeding program to get the nastiness out of wolves. It is surely more likely that God created dogs ready-made than that prehistoric man, migrating from place to place, could stick to such a project.
Yea, I know, I'm being a crank. Better on this issue than something having to do with the 'Rats, right?