The link is in German.The Google translation's headline is misleading as the Syrians didn't actually brandish any guns.
Short summary below:
In an asylum facility in FĂźrstenfeldbruck / Germany a Nigerian woman accused a 20yo Syrian male of sexual harassment.
Police arrived at the facility. The intention was to identify the accused Syrian and then to relocate both the Nigerian woman and the Syrian to different facilities. This was to done in order to protect the woman.
A crowd of Syrians gathered. They wanted to prevent the Syrian male's relocation at all cost.
In English they threatened the police with armed force that would be used to implement their will. The threats are described as 'massive.'
Only massive application of force by the police prevented an escalation, a spokesman of the officers said. The situation was close to a tipping point.