The definition of fascism is trivial: only one ideology is permitted (no matter what that ideology is exactly), anything else is forbidden. So any forced limitations without objectively obvious/proven reasons that are welcome by community is fascism. As simple as that. Limitations of theft and killings are not fascism because most people are against those activities. Limitations on education access is fascism because most people welcome education. Those who have different opinions can impose their own private limitations in the non-fascist community. Like age restrictions for this or that activity.