Masking on a demonstration has recently been turned from an Ordnungswidrigkeit ("contravention" according to Wikipedia) to a felony in multiple states. The aim behind this is to be able to prove via video who is responsible in case violence erupts - yet the biggest perpetrators and provocateurs, the police, don't have individual name/number tags, and more often than not they wear masks.
Oh, and it's illegal to bring any kind of arms to demonstrations, most often it's even forbidden to bring glass beer bottles (and violating this can be prosecuted as a felony).
Sometimes I feel that our governments have intentionally disarmed us - mostly after a couple nasty amok runs at schools, but I believe this is rather an excuse. The real issue at hand is that in case the AfD with their fascist world view ever comes to power (hell, they already got 25% in Saxony), the population won't have anything to fight them with.