Actual photograph of the Boogaloo patch found on a ballistic vest in the van Steven Carrillo used, according to the criminal complaint filed against him: https://www.justice.gov/opa/press-release/file/1285706/download?utm_medium=email&utm_source=govdelivery

"Carrillo appears to have used his own blood to write various phrases on the hood of the Toyota Camry that he carjacked... I recognize the following words and phrases: “BOOG,” “I became unreasonable,” and “stop the duopoly.” From the complaint: https://www.justice.gov/opa/press-release/file/1285706/download?utm_medium=email&utm_source=govdelivery

Why an igloo and Hawaiian print? It's wordplay/meme-play on the original term "Boogaloo," an ironic term for another civil war/uprising. (from "Civil War 2: Electric Boogalo)

Fear authorities were monitoring"Boogaloo" prompted new slang

Boogaloo -> "Big Igloo" -> "Big Luau"

The best one-stop Boogaloo explainer so far comes from @jason_a_w and @IwriteOK: https://www.bellingcat.com/news/2020/05/27/the-boogaloo-movement-is-not-what-you-think/

More context on "I became unreasonable" from @BrandyZadrozny @oneunderscore__ + team

https://www.nbcnews.com/news/us-news/man-charged-deputy-ambush-scrawled-extremist-boogaloo-phrases-blood-n1230321