Earlier quoted context omitted.
It's reasonable to note that it's a much smaller offense in this case than with Cuba, regardless of what one may think of the merits. There's a difference between holding a grudge over acts like expropriation and revolution and trying to enforce correct speaking and writing by everyone. The latter seems hypersensitive and quixotic. It would be silly if the US cut off travel to Canada because they recognized the exist…
Do you think in the Civil War, the US would've cut off travel to the UK if the UK recognized the Confederate States of America?
There's no way to tell what would have happened if a hypothetical rump CSA territory still existed circa 1934.
But we can look at Vietnam for comparison. The US normalized relations after 20 years, not >70.