Ashli Babbitt was exercising her 1st amendment right as a protester attending the Jan 6 Stop-the-Steal rally; people being understandably angry in the light of brazen fraud.
Babbitt was unarmed nor did she intend to harm anybody. Most likely she didn't even break the window.
Labelling Jan-6th protesters domestic terrorists is same tier as labelling Trump supporters white supremacists, Conservatives alt-right nazis or bronies crypto-pedophiles.
Cheering the death of political opponents btw is escalating pre-war rethoric; see my other comment
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