I don't defend these attacks but these gay activist are behaving in a manner similar to pussy riot by trying to provoke a religious community. Tel Aviv is very gay friendly just as America and Europe have gay friendly cities. Jerusalem is none as a very religious city for both Jews, Muslims, and Christians. It's not like Jerusalem persecutes gays but the pride parade is going out of it's way to get a response and reaction. Religious people and Secular people can coexist if they have their own communities but they don't need to impose their values on each other. Gay activist and feminist want the whole world to accept their values.
If they can put up with sharing Jerusalem with one another then they can put up with sharing it with LGBT people.