In a way he did cause this mess, depending on how you look at it. His hesitation and general dicking around has made it a lot harder for the NFL, and he and Kroenke would already be partners in Inglewood (according to a report a while back) if not for whatever happened (I believe there were suggestions that he was hesitant again).. Make no mistake, the NFL wants LA back, and regardless of the teams that end up there it was Kroenke finally saying "crap or get off the pot" and starting things up. It might be a mess, but it's a mess that the NFL wanted (in some respect) and it's the Carson project that has made it worse, not Kroenke or Inglewood.
I don't think the NFL is short sighted enough to just look at distances and take nothing else into consideration. I also don't think they will ultimately give two shits about how traumatic