That is what you get from a party that doesnt try to rigerously force the party line. Democrats are far better at reigning in both thier moderates to fall in step when the party wants them to, and quieting down thier hardcores when they feel the need to. Of course they have most of the MSM quieting down any hints of democratic schism while highlighting the slightest Republican kerfluffle, so you got that as well.
The big difference is that the crazies on the left are not nearly as crazy as the crazies on the right. There is a much bigger gap between a far right conservative and a moderate Republican compared to a far left liberal and a moderate Democrat, and the reason is that far left liberals are much closer to the center than the far right conservative who is standing on the edge of the earth about to fall off.
Bullshit. The issue is people like such as yourself to lump all those stormfront and milita crazies with what democrats consider the "far right" i.e. libertarians and small government supporters , while convinently ignoring thier own commie/socialist/PETA/Earth First nutters. Look at DiBlasio for christs sake, he was a Sandinista supporter, and that gets not only a pass, almost faint admiration.
Far left liberals are far left liberals, its comical that you have to make them more palatable by calling them "more center"
In a country/political landscape where the entire spectrum is skewed to the right -- they ARE more center.