It's not that shocking, in the grand scheme of things.
Established, authorized power generally doesn't want to encourage "anarchic behavior", or - to make a neater dichotomy - enabling un-established, un-authorized acts of power.
It's one thing to encourage people to go out and vote, and "be active, aware and moral political citizens", and another thing entirely to respond coherently when those same values are channeled through civil disobedience like this.
Regardless of what you think of these politicians' responses, it shouldn't be particularly surprising that sanctioned power tends to - first and foremost - make sure that the hierarchy of power is maintained, regardless of particular politic stripe.
I suspect that very few prominent political figures in the US will sanction this kind of civil disobedience. Not because they necessarily can't rationally and emotionally understand why it happened, but because in doing so, you risk undermining the authority of your role as a politican.
A.k.a, someone who has been formally sanctioned to be responsible for (sometimes intrusive) acts of political power.
You can feel disappointed in their responses, and that's fine and understandable. But the very existence of their job is - in some way - to prevent a system of governance that is open to this kind of "micro-justice", however just it might feel right now, given the current climate.
By all means, feel free to be let down by political figures that you look up to. But my point is that the very structure of modern, democratic, political systems, enacted through the job of being a politician, is in many ways fundamentally opposed to pockets of society seizing political capital.
That being said, it doesn't let these people off the hook if you feel let down by their rhetoric. I'm just giving my little take on why politicians of prominent power generally don't want to encourage this kind of behavior among citizens.