I am now a 121 guy, but was a 135 guy a few months ago. We were the first 135 company approved for KCM. I don't see the big deal.. KCM was not approved because the TSA bowed to ALPA, rather ALPA made TSA realize it is a worthy program. Obviously unless all background checks are passed you will not be eligible for the program.
There is just no reason to be up in arms about 135 guys using KCM. I think some 121 guys are just on an ego power trip.