The ELCA has allowed their churches in other states to perform gay marriages where it is legal (see here and here for instance), so this is not new news. But it is another proof for those ELCA members who hide their heads in the sand, saying they believe God's Word, that marriage is intended to be between one man and one woman, (see Mark 10:6-9 and 1 Timothy 3:2) yet they continue to attend and support the ELCA. People, wake up! The ELCA leadership is wrong. The Bible is God's Word, but the ELCA leadership constantly denies its truth while claiming they have a high view of it. They are leading people down the path to destruction. Millions of ELCA members who, not long ago, formally stood by the teachings of Scripture on this matter, are now acquiescing to what their leadership is telling them, despite it being against Scripture. You are sitting under this leadership. Your view and belief of God's Word has already been weakened because of the ELCA, no doubt.
You need to attend and be connected to a congregation that actually believes the Bible is God's authoritative Word! Attend and be connected to a congregation that wants to help people out of sin rather than encourage people to embrace and celebrate sin. Attend and be connected to a congregation that leads people to faith in Christ and salvation in Him for those that believe (John 3:16) and receive the amazing gift of God's grace through Jesus' work on the cross (Revelation 3:20) and His victory over the grave, not a denomination that thinks every one is saved no matter what they believe. Many will end up in hell thinking they would go to heaven because of the universalistic false-teaching which is so very prevalent within the ELCA.