When Cossacks shut that down, the Bandidos decided to make a change.
The Cossacks have been discussing an affiliation arrangement with the Hell's Angels, long-time rival of the Bandidos. The Hell's Angels have their own cartel connections and links to related drug distribution in the U.S. And Canada.
More than one cartel might've been behind the incident (a fight over the I-35 corridor?). What's worse is the body count, which suggests that the cops had the Bandidos' backs.