The Yad L’Achim claim that “buses all over the country would bring innocent Jews to be baptized on the Sabbath at the Ra’anana municipal sports center” is mostly wrong, but not entirely wrong. No people who happen to get on the bus are going to be baptized unless they went through the process, so "innocent Jews" are not really to be baptized. BUT, the already-processed technically-ETHNIC Jews that get on that bus to go get baptized are being misled about the religion and are "innocent" in some ways.
So knowing what I know, I am not upset at this ruling. Still, the municipality saw that there was going to be trouble. Trouble in Israel is typically not met with signs and media announcements, but with some kind of violence. I don't blame the municipality for attempting to dissuade then cancelling the event. Plus, this is not the United States, so there are no real expectations (despite claims) of something like The First Amendment Rights here.
And Watchtower did itself no favors trying to sneak that high school program in. That cult beats everything. They want to maneuver to violate the principles of laws on religion to benefit themselves, and yet will cry foul when someone else makes a maneuver against them. It's like cheating at cards and someone beats you anyway because they cheat better. How can you really explain and complain about that?