As he picked up a Lifetime Achievement Award, Denis O’Brien used his acceptance speech to talk about “three important areas we need to change our mindset on” in Ireland. The businessman was speaking from the stage in Dublin at the Forvis Mazar’s Irish Investor Awards, held on Friday, May 9. “I’m very optimistic about Ireland and its ability to face up to a new era of trade wars,” he said, adding: “Being Irish has been a great advantage for me in going around and developing new markets in fairly tough places, because of the reputation of Ireland.” But three things…