In what has yet to be declared a criminal act or an act of terrorism, a lone gunman opened fire at two military facilities in Chattanooga, Tennessee on Thursday, killing four Marines and injuring one police officer. The gunman, who has been identified as 24-year-old Muhammad Youssef Abdulazeez, also died. Federal law enforcement officials believe Abdulazeez was born in Kuwait -- and so, naturally, right-wing commentators have already begun spewing vitriol online. Here's what they're saying:

Another great American immigration story. https://t.co/BRM8guKHkF — Ben Shapiro (@benshapiro) July 16, 2015

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I can't wait for wall to wall coverage on the flag that motivated the #Chattanooga killer to murder four people. What flag COULD it be? — Rick Wilson (@TheRickWilson) July 16, 2015

Obviously, we need to ban the Kuwaiti flag. — Robert Stacy McCain (@rsmccain) July 16, 2015

Oh, man, that Sarah Palin is in trouble now. I think she put a target icon over Tennessee on a map once. #Chattanooga — Rick Wilson (@TheRickWilson) July 16, 2015

We've been saying it forever; hit them HARD over there, or they'll hit us here. Obama's been playing footsie with ISIS, this happens. — Doc_Actual كافر (@Doc_68W_) July 16, 2015