Absolutely. My neice's graduation was like Sunday service complete with gospel singing. It's common for a pastor to stand in front of a public ceremony and say a prayer. I've never heard about a Catholic priest or bishop (or a rabbi) standing in front of a public school graduation giving his blessing. If it happens, maybe I just miss it in the news. But I can't imagine the Protestant Christians I know going for that. LOL. I've heard them refer to the Catholic Church as a "cult". I also remember how, when I was a youngster, the Protestant kids (and adults) would poke fun at us for making the sign of the cross. And a minister once said to me, "You're Catholic? Well, you're young, there's still time." LOL.
Yes. I would not particularly care for that. I think there is a hidden agenda in people who push their religion on a captive audience attending a public school function. Why needlessly antagonize people? I think they secretly want to antagonize people and think they are entitled to and indeed required to antagonize people as part of spreading the gospel. But it never works! Nobody is going to covert because some teenager says a prayer to Jesus at a graduation service.