BULL! God does not make sin! Man does!
And God most assuredly does not bless sin.
Just like every other sinner with his or her particular pet sin, their sins are not made by God; they are the result of Original Sin and Adam and Eve's disobedience to God. And just like every other sinner, they seek excuses and justifications to cling to their sins.
Read C.S. Lewis's The Great Divorce -- he explores this concept with creativity and pithy wisdom.
The Bishops of the General Convention and their hangers-on would do well to look at the example of the Clerical Ghost (in gaiters) in that book, his justifications and his excuses. This has all been said and done before by those seeking to excuse their sin . . .