Ask Him. He is not obligated to bless a civil union ... He isn’t obligated to bless a church marriage, either. But the vows entered into in Church marriage obligate the oath givers to the institution God ordained. In keeping their oaths they will receive blessing. Breaking those oaths is an offense toward God. Does anyone expect that sexual degenerates of any kind will keep such vows? Look at bill Clinton. He has spat upon the vows so foten he doesn’t even see himself as an offense to God. Thus unregenerate people making marriage oath are spitting upon vows before God, and that makes the fallen angel and his minions cackle with delight.
I think it’s pretty clear what His opinion is. After all, He created marriage itself.