He wasn’t investigated, because he wasn’t a white Trump supporter. Those are the only “domestic terror threats” that the government is concerned about.
You’re right....to a point. But I, old doubting Thomas, think it’s worse than that. I believe that all our law enforcement agancies are corrupt; at least at the top. I believe they KNOW who every nut case around the country is. I believe the keep in touch with many of them, with under-cover agents who interact with them, test their emotions, even make suggestions to them and evaluate how close they think each one is to going postal. I believe Ramos showed signs that he was ready to blow, and an agent egged him on; even suggested that the elementary school would be an easy target. And WHY would they do this. Because they hate regular folks being able to defend themselves. They MUST create an atmosphere where privately owned firearms cannot be permitted and MUST be confiscated. JMHO.