For the same reason that they get much more consideration for their “feelings"—they’ll physically attack you if you don’t submit.
Two years ago Dearborn, Mich., paid a group of Christians $100,000 for violating their free speech rights. They better get out the checkbook again.
I generally don’t think that what this group of people is doing is effective evangelism. But it does expose the so-called “religion of peace” as being a misnomer. Does anyone believe that a group of Christian youths would behave similarly if there were a group of Muslims at a Christmas Carnival?
If you can’t stomach the whole thing, I encourage you to fast forward to the 20 minute mark. After being threatened with arrest if they don’t leave the festival and being told that the police couldn’t spare two officers to protect them, they manage to get 12 officers to pull over their van on a residential street away from the festival.