Once again, it's just eerie to me how much this sounds like what I was thinking at this time in 2004.
I don't know any democrat who thought Bush's policies couldn't be changed or defeated even if he won a second term. Our belief is that if Obama wins a second term, the policies that are enacted will stay permanently - developing a society that functions around cradle to grave government care that in short time gives way to an economic collapse that tips the balance of power in the world to Russia and China whilst the rest of the western world collapses into chaos.
The democratic opposition to Bush was for a much less motivating reason. It was primarily a combination of a feeling of delegitimacy left over from the 2000 election, anti-war protest and support for gay rights. That's not like the opposition we have to Obama. It wasn't the end of the country if Bush won a second term. The country would make its typical cyclical shift between democrats and republicans every 8-12 years. It certainly did during the 2008 election. This year truly is different. The feelings I described in the paragraph above are not just felt by a bubble of conservatives pushing conspiracy theories. The view is near uniform among every single registered republican, even the republican moderates I know and many independents.
You have no clue about the anger people felt about Bush in 2004. Hell, I still get angry thinking about it. We were fighting for the morals of the nation! We were fighting for the good name of America, a country that doesn't go around invading people just because it can.