Can you be specific about when this has happened?

1.) Overwhelming majority of political violence is by right wing.

2.) About Kirk specifically, liberals signaled "murder is bad" hard and frequently. Meanwhile Kirk himself signaled hatred.

3.) Meanwhile, Trump, Vance and Hegseth are constantly signaling "murder is good actually, if we are doing it" and "bullying is manly thing to do".

And that is exactly why it is userful to distinguish between "good thing signal" and "bad thing signal".

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Conservatives have the option to signal good things. They make different choice.