Are you unaware of our involvement in the area? I suggest clicking on the links in my comment. Any decent response would involve deposing both the saudi arabian government and our own, including many high-level state department officials, and charging them with crimes against humanity. Probably a few other dozen states, too.
But international law is a joke these days, so humanity will let the missiles do diplomacy instead.
...
Look, obviously violence is bad. But we have made such a farce of all other ways of negotiating conflict that it's refreshing to see people stand up for themselves without our permission.
For posterity, in response to "Idk, supporting literal terrorism is pretty trendy these days":
> Inexplicably, people do tend to vote here. I do, however, condemn the state of the united states of america—the map of the world would certainly be much improved without that name on it.
Would you care to educate us?