Ah, a chance to use that excellent German word Schadenfreude. On 1 May in Solingen, the German anti-Islam movement PRO NRW (Pro North Rhine Westphalia) held a demonstration. Hundreds of assorted Muslims and far-left extremists turned up to harass and intimidate them. Two of these "antifascists" found themselves in the midst of a horde of Salafist Muslims, who promptly started beating them up with bits of wood. Even after they were lying helpless and passive on the ground, the Muslims kept laying into them. One was bad;y hurt in the head; the other in the arm. Both required hospital treatment.
Apparently it wasn't a failure of recognition either. The Muslims knew that these were leftist anti-fascists who had come to protest against the "islamophobes". They beat them up anyway.