The "if we make this software, criminals will get their hands on it" argument is absurd. Does Apple have no faith in their own security? The FBI has at no point suggested the modified firmware would ever leave Apple's possession.
Does Apple have a problem with theft of internal code that I am not aware of?
Further, I'm just waiting for someone to transpose the argument, for example: "Apple says guns shouldn't be manufactured for any reason because they could kill someone" or "Apple says cars are unsafe and should be banned because people are killed in accidents."
facepalm
EDIT: Behaving like a bad actor even if you believe your cause is just still makes you a bad actor, albeit one with good intentions. If they want to win the argument they should stick to realistic positions and leave the manure shovelling to "those other people".