One of my soldiers is now the SAC in Boston. He's very much pro-2A. (He also took over as ass't SAC in Phoenix AFTER F&F became a scandal. He was sent there to clean it up. And a lot of the clean up was done on the Q-T.)
I suspect that in reality ATF agents are as varied in their opinion regarding the 2A as any other organization of similar size is.
P.S. --- Perhaps the NRA and others would be less fearful of big bad govt. if it's police agencies were less prone to shooting 14 year old kids in the back, unarmed women through door windows, and attacking religious communism -- no matter how wacky --- as well as being somewhat more efficient, thorough, and honest in their regular enforcement activities.