Because, clearly, actively calling for and organizing a group centered around my death and the death of my community isn't enough
You don't get to decide that for yourself because you live in a society where you gain benefits from designating sole authority to enact violence to the state. If you engage in violence, then the state will in turn give you what you deserve. Even if you understood him correctly, which you did not, he has a right to speak them and people like you get to go to jail if you go around assaulting people.
He had repeatedly called for an ethnic cleansing of America. And now his buddy, Steve bannon is in the white house. The state has a monopoly on violence, and they aren't on our side
We also have civil authorities - like the police - that we bestow with the power of violence to protect these lines. Additionally, we have civil rights and hate crime laws that bestow additional punishments for groups like this acting on their beliefs.
I think we will be better served reinforcing our shared beliefs in these civil authorities rather than acting as vigilantes and undermine our moral stance and possibly reinforce/embolden the support for our enemies.