The "American century" was largely built on the USA being the recipient of brain drain from the rest of the world. Brain drain from Germany alone, even just before the war, helped propel America to the top of the global game in science and technology. Germany was once the world's great physics powerhouse, and it passed that baton to the USA in part because many of those physicists were Jewish.

Actively trying to keep talent out to appease idiots who believe in the type of ideology all those great physicists were running away from is national suicide.

BTW, the rise of Xi Jinpeng is an incredible opportunity to absorb top talent from China, and we are squandering it by making ourselves inhospitable. Same goes for top talent who doesn't feel like swinging on Vladimir Putin's nuts.