My understanding is that he was raised evangelical. I don't think he's converted to Catholicism, but he is a fan of some Catholic authors on eschatology. I find a lot of his rhetoric around the end times distinctly more evangelical: ultimate fight against good and evil and all that jazz.
At the risk of getting too theological, the Catholic view would push back on the idea of the end times as being a battle. The Catholic faith views Christ as already the victor of history, and the end times as a trial to be borne, not a battle to be won. Whatever I've read from him or seen reported about his thoughts, it basically boils down to building one Antichrist to fight another Antichrist.
At the risk of getting too theological, the Catholic view would push back on the idea of the end times as being a battle. The Catholic faith views Christ as already the victor of history, and the end times as a trial to be borne, not a battle to be won. Whatever I've read from him or seen reported about his thoughts, it basically boils down to building one Antichrist to fight another Antichrist.