Its an extremely simple calculation in my book:
You associate, even indirectly, my company with your celebration/validation of political violence *irrespective of its polarity*, and you are done within the day and permanently blacklisted.
No if's, but's, or excuses.
As I wrote before, endorsement of behaviour so abhorrent and so intentionally divisive and reputationally destructive is entirely unacceptable, and way beyond the pale of free speech protection.
I'd also add its incomprehensibly stupid and irresponsible, given the potential repercussions. I mean, I'd ask a person holding such beliefs to stop for a moment and then tell me exactly how the consequences are going to play out?
Rationally if your belief is that your "enemy" must be so irredeemably subhuman and evil that it warrants such an act be perpetrated on them, how do you suspect their allies and supporters are going to react?
When Gavrilo Princip assassinated Archduke Franz Ferdinand in 1914 do you think he could have conceived that this single action would start a chain reaction that ignited 2 World Wars? Millions upon millions of all races, creeds, and colours killed, maimed and displaced? The rise and fall of empires and regimes, 50 plus years of the world living in fear of thermo-nuclear annihilation as a result of the fragile balance of geopolitical power failing...?
If you don't recognize the calamitous potential of political violence you are the worst sort of fool. The dangerous type.