Because he is allowing the media and the sympathetic to deny what he himself has written as true. The fact is this would not be any issue for Obama to admit if he had actually been "saved" at an actual loving, Christian church. Instead he chose an American-hating, black liberation church with many marxist roots. Such a church has many strong roots growing from the Farrakan wing of the American Muslim world and thus Obama's claim to love Jesus and all he stands for has no value.
Yes! That is in fact something worth hammering him on. That's recent (past 20 years), and probably represents his views a lot more closely than some childhood Muslim school.
Excellent point.