Now here's something you'll really like, The Washington Post provides a nifty database of votes by Senators along with what the "official" GOP and Democratic Position was. This makes looking at the voting record of a particular Senator crystal clear. Click on the vote itself and see the actual vote totals. Pretty simple.
So what would have happened if the killer bees had Ned Lamont voting in place of Lieberman? The answer is that the vote outcomes would not have changed. Which means that every outrage the killer bees feel would still be an issue. The killer bees would have you think that the actual votes don't matter much, "it's the rhetoric" that matters.
Except that the Democrats as a party have a long history of governing better, a tradition Senator Lieberman is a part of. Governing means actually doing things, instead of just talking about it. The work of a senator includes sponsoring legislation, and amending bills. The committees who control what gets sent on are all are chaired by the members whose party holds the majority, the Republicans. As it turns out, being able to compromise and make deals is a good thing. A senator can't be effective he's not willing to work with his colleagues, just look at Bill Frist as an example.
The killer bees would have you think that this primary vote is about the soul of the Democratic party. It's not, it's about the soap box of the Democratic party.