It’s not about the tuition (although most of our universities are effectively subsidized by foreign students paying higher tuition fees), it’s about having an easily exploitable labour force while they’re here studying. Less familiarity with labour laws and less protections than a citizen make for attractive wage slaves.
Of course, the solution isn’t tightening immigration, but the actual solutions might make the wealthy accumulate riches at a slightly slower pace, therefore it is unimaginable.
Agreed, infantilizing fascists is dangerous. Are most of their supporters just dumb/misinformed? Probably. But we mustn’t pretend that the movement isn’t orchestrated by very smart people manipulating the masses in order to consolidate power in the hands of them and their rich friends.