Simple, the Jewish diaspora was spread out from their homeland among many different nations that spoke vastly different languages so they needed a language to unite them in Israel, so it made sense to revive their historical language, whereas in Ireland we were always the majority in our homeland and already spoke a common language i.e. English and since most of our diaspora was in English-speaking countries (US, Canada, Australia etc) if any of them ever decided to return to their ancestral homeland they already spoke English and would assimilate with ease.

Personally I'd love for the Irish language to have new life. I was raised in the north and went to a Catholic school so Irish was on the curicculum but since it was entirely optional I never bothered my hole with it; I regret it now however, I think it's important to keep your national language alive. Been using DuoLingo and listening to an Irish language podcast over the past few months and will probably attend some classes for Irish when I move up to Belfast.