First of all, the ELCA is NOT the only Lutheran denomination. There are several conservative Lutheran denominations that teach that all forms of homosexuality are contrary to the Word of God. You have plenty of options. You shouldn’t be surprised that the ELCA voted to accept another practice contrary to the Word of God. It has been teaching false doctrine since it’s conception. Why did it take you so long to figure this out? What are you going to do about it?
False doctrine is true. Some ELCA pastors in my area are teaching that it was necessary for Christ to die, but it is not necessary for people to believe in him in order to be saved.