Now, notice two major points:
1. He begins by saying, "We believe...." People believe a lot of things, and a lot of those beliefs are not necessarily true!
2. However, and even more egregiously, he states, ""Living a Christian sacramental marriage is a fundamental way of attaining salvation." Where did that idea come from? It's certainly bears no relationship to any Christian theology with which I am familiar! His statement is not only preposterous, but it is heretical!
The Bible teaches, particularly through the Apostle Paul, that God imputes salvation to us, and that imputation occurred before the worlds were even formed. (See, for example, Ephesians 1:4; Romans 8:29); the free gift of God's grace (unmerited favor) is appropriated by our faith (trusting God over and above seen circumstances). (See, for example, Romans 5:1-2)
Moreover, read Galatians 2:16: "Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified."
Gay Christians can and do trust Jesus! If one lives under the Law, the strictures of mere human beings, the yokes of bondage placed by such institutions as the Roman Catholic Church, he/she has nullified faith and thrown God's gift of God's grace back in God's face.
The Bible makes it clear that it is only by faith that we can please God (Hebrews 11:6), and not some man-made belief system that serves to justify organizational and individual prejudices for which there are usually financial, psychological, social, and political rewards to be garnered.
To even suggest that heterosexual marriage within the Christian tradition "is a fundamental way of attaining salvation," Bishop Malone is not only being heretical, contravening the Bible, but is grasping at false straws to make an argument in a way that merely shows his and others' desperation due to the bankruptcy of their prejudices against same-sex marriage.
And for him to pontificate that Gay people should not be discriminated against, also shows the Bishop Malones of the institutional Church world to be terribly naive or cynical in the extreme.
Gay people are discriminated against, and the RC Church is one of the major religious vehicles that provokes and seeks to justify that discrimination.
And, as we see in this brief video, that discrimination is based on false biblical exegeses, heretical theology, and just plain downright blind prejudice!