To elaborate a bit on Macron’s comments, a patriot loves his country, while a nationalist despises everyone else. A patriot is willing to sacrifice for his country. A nationalist wants to bully the rest of the world.
Trump has described himself as a nationalist. Given that he used bone spurs to avoid military service, became extremely wealthy by screwing people over, and won power by demonizing immigrants and Muslims, for once, I would have to agree with him.