I am so sick of reading proposals like this from probably-white non-US Westerners who have probably never actually had to engage with the idea that racism exists. This might get some fascist groups off the internet, sure, but it would also likely push oppressed minority groups who do not necessarily have access to quality education out. That's the history of minimum IQ requirements for voting, mind you.

Put this proposal in front of a Proud Boy and they'll likely be in favor of it, because they believe whites are the only people smart enough to pass it. They'll stop being in favor once it goes into effect and they're included along with groups they hate in the "not allowed online" crowd, but the groups they hate, some of whom's situations may be made direly worse by the lack of unrestricted internet access, will most likely be pushed out too.