What about the wars in Vietnam under Johnson, Iraq and Afghanistan under Bush, Libya under Barack Obama, and the hundreds of other wars they started after WWII? The imperial nature of the US has never disappeared.
I think the world still supported some, like the Afghanistan which is connected to Islamic terrorists. But not all was supported, example is the Libya which United States should leave them alone and let the fight remain locally within Iran. I do not also see a good reason for the war in Vietnam. US funded the South Vietnamese, but Soviet Union and China funded the North Vietnam. The North Vietnam won and merge the South to be Vietnam of today.
If the US invaded Cuba, it would be no surprise, as they have done so hundreds of times in the past. They are people who disregard international law and habitually bully smaller nations. Thats just their nature.
It will be totally wrong because Cuba did not do US anything than US want to show superiority.