This Mr. Wu did something bad inside China, without any evidence that he was colluding with the national and local government of China. How is that translate to security risk at US domestic?
And all these Chinese stem students already contributed critical work to the boom of high tech industry. You are not appreciting their hard work, and link a speculation to national security risk?! How heartless one can be, not only thankless, but vile and judgemental...
Edit:
I am a Chinese American born and raised in China.