Eco's analysis lacks fascism's focus on anticommunism, which is the whole reason capital first tolerates and later embraces fascism. This is the defining characteristic, especially if you try to parse out what separates fascism from a mere dictatorship or an absolutist monarchy.

There are also some points he makes that are things everyone does to varying degrees. You can drop the "the enemy is both too strong and too weak" on anyone who talks about the strengths and weaknesses of an opponent, for example.