Pure politics...the Church, as it likes to be known, is losing power in the world, and so needs young people in the pews. There was nothing in his background to even suggest a "miracle".
I find myself quite grateful for my atheist, which lets me look at all this and see if for what it is, just another con game to gain wealth and power. The Vatican is a foreign nation, and its paid employees in the US should have to register as Foreign Agents. I look at the far right fanatic Catholics that Trump installed on our federal Supreme Court to take down our First Amendment rights, and I fear for the future of our democracy.