Lutherans Concerned/North America (LC/NA) is an organization who's mission is, "Working at the intersection of oppressions, Lutherans Concerned / North America (LC/NA) embodies, inspires, advocates and organizes for the acceptance and full participation of people of all sexual orientations and gender identities within the Lutheran communion and its ecumenical and global partners." (See here)
This organization "was officially invited to participate in the ELCA National Youth Gathering, held July 22—26, 2009 in New Orleans. LC/NA was invited to host a 10’x10’ booth in the 'Interaction Center' of the Youth Gathering." (See here) The ELCA officially invited this group to the youth gathering. Two things should be noted. The National Youth Gathering was held before the same-sex votes at the ELCA church-wide assembly in Aug. 2009. Also, even though the ELCA says every church has a right to decide for themselves what policy (God's or ELCA's) they will follow, the ELCA's view will be "preached" by the denomination as a whole.
After a lot of browsing around the LC/NA's website I think it is pretty safe to say that this group is not in the habit of calling homosexuality a "sin," as God does in the Bible. The purpose is not to tell kids that homosexuality is not God's will for them. The ELCA wont say that. So we should not be surprised that the ELCA is now trying to indoctrinate our children with their blatant denial and rejection of scripture.
We are all sinners and the loving thing to do is to help sinners out of their sin. (If you haven't read "Loving your Neighbor: What does love mean?" by Rev. David N. Glesne, please do. It is a must read.)
If you want your children and your children's children to be taught the ELCA's version of truth then stay in this denomination. If you believe God's word is truth, then for the sake of your children, get to a church that believes it!