As retired engineering professor and a conservative, I would differ with the implications of this article. There are too few US students sufficiently educated in mathematics to meet the requirements for an undergraduate or (even more so) graduate education in engineering, physics, chemistry, etc. As a nation we gain a great deal from the contributions of foreign STEM students educated in our colleges and universities. In many STEM disciplines and sub-disciplines, there is a substantial shortage of new graduates to fill the needs of our economy. Certainly, there are some that are overfilled with graduates, but this does not invalidate the real need.
Regarding STEM students from China, surely some may represent a security risk and should be monitored when they obtain employment in sensitive positions just as all new employees should.
STEM students admitted for study in the US from China are, in my experience, among the best qualified in the world.
I believe opposition to all STEM students from China must be characterized as bigotry.
BTW, I was born in the US of white, Anglo-Saxon, protestant parents and have no personal bias in favor of Chinese.