Did you actually just dredge up the stupid JFK assassination story? If anybody in the GOP had a hand in that, it wasn’t Cruz, it was Poppy Bush. Google it.
No reason U can see that they couldn’t both be involved. The CIA was undeniably recruiting many Cubans at that time and somebody paid for Cruz Sr’s UT education. Perhaps the CIA paid? I have trouble believing the whole “I bus boyed my way through college” story. His involvement would be a good reason for the long hiatus to Canada a few years later until the heat died down. Cruz Sr. working for Poppy would explain Ted’s being hired by G.W. Bush later. It was a legacy hire! I am not saying Cruz Sr. was definitely involved but it would not be surprising to me if it turned out he was.