Something I'm not seeing a lot of mention of was the fact that the Canadian aerospace program was absolutely riddled with Soviet spies.

I don't have references in front of me unfortunately, but if you choose to believe me, a good amount of the American resistance to the Arrow program had to do with direct technology transfer to the Soviet Union via their thorough penetration of the Canadian aerospace program. The Arrow represented a conduit of American aerospace knowledge directly to the Soviets, and had to be stopped.