I’m not sure why you think that QNX can’t be hacked.
I have a very small shop in the financial industry that relies on several personal relationships that could be terminated by a leak. I need the best security I can get on a limited budget. I cannot afford the security consultants that larger players hire. I have found that smaller consultants are usually wedded to one supplier or technology, which can lead to trouble. I have no computer background, so I rely largely on cowboy logic.
So, if G7 governments, including Germany and the U.S., use Blackberry BES and Secusmart(VOIP) voice security, I cannot believe that they do so for any other reason but that it is currently the best. No fit of pique or anger over other issues would cause a country to risk its safety by choosing anything but the best security.
That may change tomorrow. I noted that DoD recently permitted Android and iOS handsets. That us cause for concern. Obama is still issued a BB, however.
Part of my ongoing due diligence involves posting my current understanding on security-related websites and guaging the reaction. I cannot afford to trust anyone.