Yes, that's clear, but not against the EU. That would cost the US dearly. There are various other countries he could abuse for this purpose. I assume that Venezuela served as preparation for an invasion of Cuba (Maduro was the most important oil supplier for Cuba). I simply cannot understand why anyone would believe that a military conflict with the EU is even remotely realistic. It would isolate the US and cost the already weak US economy billions. A war against any South American country would not, even though it would have the same bogus effect on the US population.
Moreover, Trump would be fulfilling a "US-dream" that has been propagated for ages if he attacked and maybe defeated Cuba. Why do you think he would strike against the last vassal states he has left (in fact that is what the EU is - I can confirm unfortunately because I'm from the EU, specifically from Germany where we have a head of state that is in fact a US lobbyist)? That would be absolutely insane.
An attack on Cuba in violation of international law would of course be equally reprehensible, but it would probably even been met with approval among US citizens, while it should be clear to any reasonably educated US citizen that a conflict with the EU would be completely contrary to the most basic US interests.
I cannot for the life of me understand how it is possible that these empty threats are taken even halfway seriously.