Yes, to answer your question. there are US airline pilots who do not agree this is a good program.
I have to carry my M-9 pistol while flying my military (reserve) aircraft, but that is for an entirely different reason. That is for self defense on the ground, while evading capture.
I believe that civilian airline pilots sjould have been trained, long ago, in resisting cockpit entries, rather than the passive approach which was chosen pre-911. The terrorist knew the passive approach and exploited it. Now, we are going to knee-jerk because ALPA has so much lobbying power, and it makes a Senator or Congressman look like he is doing something to combat terrorism. Don't misunderstand...I am a die-hard, gun-owning conservative, but totin' a pistol in the cockpit is the wrong approach.
I am licensed (American spelling) to carry in my state, but I will not even consider applying for the new FFAM program. It's the wrong approach, and I see it gone in a few years.