Mk Ultra didn't stop, it only changed. They learned that by exposing a population/their children to enough stressors and reminders of stressors — like constant news coverage of mass death events or even "drama" tv/movies/music/etc. that conditions us to be more neurotic — it becomes possible to induce personality disorders, more or less. Especially cluster B personality disorders such as ASPD, BPD and NPD.

These disorders tend to make people very prone to an "us vs them" mentality. It makes them very easy to manipulate, even by a television, by telling them that we need to worry about Muslims and Russians and anyone else for that matter. ...But if these sleeper agents manage to slip through the cracks by never getting hooked on mainstream news/politics, then their idea of the "other"/enemy is liable to be whoever or whatever caused them the most suffering personally. ...Which for most of us was school, peers and our families. Maybe the opposite sex...

It's a win/win, for the ones pushing it. If they become a school shooter, it adds more fear and distrust to society and induces more disorders. If they DO get hooked on mainstream news/politics, then they're liable to sign up to fight in even the most unjust wars. Not to mention priming everyone for in-fighting, to keep them too distracted to see the bigger picture.