Can a Christian marry a Catholic? — Gospel distinction and the unequally yoked principle

Mike draws a distinction between two kinds of Catholics: (1) Catholics in name only who do not hold to official doctrine, and (2) Catholics who hold to the Church's official teaching, which Mike says constitutes a false gospel. The real question is whether a Christian can marry a non-Christian — he says no. He acknowledges some self-identified Catholics may genuinely hold a biblical gospel, but warns of real future marital conflict over sacraments, catechesis, and doctrine. He pivots to the deeper question: Am I willing to submit to God's will even if it means surrendering this relationship? Idolatry of a romantic relationship is the diagnostic test.