Because they claim to be tolerant of other religions AND of the way various Jews practice. This story isn't even about Ultra-Orthodox Jews picking on people of other religions, it is about Ultra-Orthodox types harassing more moderately religious Jews.
They are supposed to be a Jewish State...they should act like it.
They should act like it by allowing Ultra-Orthodox fanatics to harass 8 year old girls? They should act like it by condoning Ultra-Orthodox Jews spitting on Christians in Jerusalem?
Here is Bibi's views on it, you can take your defense of Orthodox obnoxiousness up with him:
"In a Western, liberal democracy, the public realm is open and safe for all, men and women both, and neither harassment nor discrimination have any place there,"
And that's fine...if they wish to be a western, liberal, secular state.
But don't try to have it both ways. And that's my point.