From an excellent piece in the Nation:
Beneath the sheep's clothing lurks a culture warrior wolf. After the Saddleback forum, he told the Wall Street Journal that the only difference between him and James Dobson was that of "tone." After insisting that his agenda was "broad," and holding himself out as an impartial arbiter of the forum, he declared that voting for a "Holocaust denier" (i.e., someone who is pro-choice) is a "deal-breaker" for many evangelicals. Obama was pressured to talk about "abortion reduction," but Warren likens such rhetoric likening it to Schindler's List: an attempt to save some lives but not end a "holocaust." ...
Warren, a creationist, believes that homosexuality disproves evolution; he told CNN's Larry King in 2005, "If Darwin was right, which is survival of the fittest then homosexuality would be a recessive gene because it doesn't reproduce and you would think that over thousands of years that homosexuality would work itself out of the gene pool."
Warren protests that he's not a homophobe; it's just that two dudes marrying, in his mind, is indistinguishable from an adult marrying a child, a brother marrying his sister, or polygamy. He thinks his AIDS relief efforts represent an elevated form of Christianity over those non-evangelical do-gooders whom he compares to "Marxists" because they're more interested in good works than salvation. The rejection of the "social justice" gospel in favor of the salvation-focused evangelicalism that has come to dominate the definition of "Christian" lies at the heart of the religious right agenda to marginalize liberalism and harness its political power.
Warren represents the absolute worst of the Democrats' religious outreach, a right-winger masquerading as a do-gooder anointed as the arbiter of what it means to be faithful. Obama's religious outreach was intended, supposedly, to make religious voters more comfortable with him and feel included in the Democratic Party. But that outreach now has come at the expense of other people's comfort and inclusion, at an event meant to mark a turning point away from divisive politics.