Can a Sufi take up arms?

I have always thought of Sufis as people obsessed with wine, poetry and god. Arms and ammunition was the last thing in mind. But that changed after reading this caption in the NYT about the Sufi militia in Somalia that is fighting an extreme Islamist violent group. I think it's a lame oversight by the NYT. What they probably mean is moderate Islamists! Kind of good Taliban vs bad Taliban.