Thankfully, David Sirota has taken the time to summarize the issues at hand.
Go fuck yourself because all of your arguments are about what policies should be pursued to rescue Democratic politicians' electoral future, rather than about what policies are needed to rescue, say, the fucking country's future. Additionally, go fuck yourself because if you know so much about winning elections and if you are so sure conservadem-ism/Blue Dog-ism is the way to win said elections, how come it was the conservadems/Blue Dog candidates - not liberal candidates - who lost the most elections this year?
Also, go fuck yourself because the fact that you are even trying to create the same old bash-the-liberals debate exposes you not just as substantively wrong, but as professionally employed to despoil our culture with bullshit -- and specifically, with bullshit that you know is bullshit. That, really, everyone knows is bullshit.
David lays out all the reasons why Dems lost. You should give it a read.