You seem to have missed the entire point of the Old Covenant, the law given to the descendants of Jacob.

The old “covenant” promise of God reveals to us the nature of God, and that God is concerned with everything in our lives. Not just a few big things here and there, but with EVERYTHING, even the littlest things, what we say, what we eat or what we do.

The restrictions of the Old Covenant were written to a different people, in a different time. The Old Covenant is done away with. That's why Christians don't follow the restrictions in Leviticus, those restrictions are powerless to rescue us from our wicked condition. (We don't offer sacrifices at the temple, we don't stone disobedient children, we do put cheese on our burgers…)

We needn't look to the restrictions in Leviticus to tell us whether God intended for same sex marriage or not.

Scripture CLEARLY reveals that God had no intention for a marriage union between a woman and a motorcycle, or a man and a goat… according to God's standard, those relationships do not QUALIFY as a marriage. Redefining “marriage” to mean something different does NOT change what God intends for us.