It should worry everybody.  He has threatened violence against (and this is not an exhaustive list):

* Main stream media networks
* Reporters
* Democrats
* Republicans who criticize him
* Undocumented Immigrants
* Documented Immigrants
* Corporate Executives
* Women who accuse him of assault
* Jews
* People of Color
* "criminals" (with quotes because his definition of that word is effectively anybody he doesn't like)