If the Irish are genuinely proud of their ancient language (as they should be), they should begin using it as their primary language of communication. (Sorry, this is a pet peeve of mine.)
I'm sure "they" all would if "they" all spoke it.
Would you insist that someone who loved classic cars could
drive classic cars?
I'm not entirely clear on what you're peeved about.
My point is that a country that is "immensely proud" of its language should use it as a primary means of communication. As whoiam989 pointed out, Israel managed to bring Hebrew back from the dead and make it its primary language, so there's no reason why Ireland couldn't do the same.
Or look at the Dutch: Almost all of them speak English, but they still use Dutch to communicate with each other.