Why don't I trust the Republican party and "mainstream" conservatives? This is why [via, via]: their leaders, elected and media, routinely make it very clear that, if they were not bound by little things like the Constitution, I would have few, if any, rights left. Or I'd be dead, which is more or less the same thing.
You want to play the "the left does it, too" card? Find the quotes. Not from bloggers, but from people with mainstream media power, political and cultural influence.
Dave Neiwert has been discussing this for some time. I think the War on Christmas will be more than a metaphor in a year or two, but it won't be atheists doing the shooting.