I would think so, but it may be nothing more than a mutual insane hatred of legal authority. Maybe nothing more significant than a small group of thugs conspiring to rob a bank. Do you think there's a deeper, more significant plot involved?
Oh...and typical US Journalism...a LOUSY story. No background, no suspected motive. They act like these things just "happen" from time to time for random reasons. Multiple suspects tells me there's some sort of "organization" to these wack jobs...so what's their deal?