The U.S wants to re-establish and maintain the petro-dollar, while all being less reliant on the middle east, and to be able to set oil and natural gas prices in the future. Trump has many flaws, but to blame his flaws for every tactical and strategical move is naive.
That makes sense in terms of Venezuela (although things might ultimately still not go his way) but not in terms of Greenland. Greenland is a very high stakes very low reward game; if that land was worth anything, the Danes wouldn't be such an inconsequential people today, but NATO is at the brink of falling apart due to Trump's aggression towards his allies. The EU is already saying things like how it's a blessing that even combined, they failed to stop China or Trump would be an unchecked godking, so if the US loses the EU, what chance does it have against China? It's totally cooked. Trump wants a legacy and "the man who acquired Greenland for the US," seems like a good one, espcially when, "The man whe defeated China" is obviously out of reach.
This sounds like cope. China didn't show up to Venezuela or Syria, refused to invest in and sanctioned Iran and North Korea and let all the sanctioned economies fend for themselves, because trade with the west is more important. As a result, China friendly governments are replaced with US friendly ones. The example of Pakistan shows what China can do if it does show up. But China appears too timid to go beyond its immediate periphery
You don't realize there are extremely significant differences between Pakistan and these countries? It is not within China's power to save countries like Venezuela and Syria, etc... Pakistan is a very special case because not only are they very close to China, making China's power projection very easy (as opposed to Venezuela, Iran, Syria), they are a people who are willing to train and commit everything it takes to building a modern military as much as their economy will allow. That is rare; a lot of poor countries will buy a few aircraft and radars to look like they have something on paper but fail in the maintenance, the training, and not bother putting together the whole integrated chain, ommitted all the items that aren't glamerous. Furthermore, Pakistan actually appears to have competent counter-intelligence, which is not always trainable as it is in the quality of people. Unlike Venezuela and Iran, when conflict happened, Pakistan didn't have to find out the hard way that they had 50,000 moles on the inside sabotaging everything.
For China to save those countries, it needs to be next level. I've said this at least twice already but I'll say it again. China's economy challenges and defeats the US first, then its technology can do the same built on the economic base, and finally, its military can follow suit built on its technological and economic base. It takes time and we've built our economy and technology to where the West cannot threaten us; we've even built our military to where the West cannot threaten us, but we have not yet built our military to where the West cannot threaten our faraway allies. Power projection is the last thing to come into being in a correctly structured rise, so we're just not there yet, though moving there quickly. Unfortunately, saving these countries is not in our power to do so now.