Senator Mike Lee and the Republicans want to take a stand and fight against mob violence. They want to publicly condemn it and make it clear that it is not tolerated nor accepted ever.
Meanwhile the Left votes against it and takes one of two very clear and very disturbing stances on the subject matter.
They are either accepting that mob violence is an accepted practice or they do not see it as an issue worth taking a stand against and fighting back against. Which one is worse I wonder?
The riots that are going on along with the occupations and the rampant destruction of property and the overt attacks against the police and citizens are examples of all out chaos being accepted by the Left.
Simply put it fits their narrative of having the sheep follow their will.