I tend to agree with you. I rather doubt the Dems pull the rug out from under our troops or commit another travesty like they did in 1975. Out in the open like this, it would destroy their national security credentials forever. At least, the rational Dems won't do it -- I can't speak for the irrational ones.
An interesting outcome of this election is that, with nominally conservative Democrats replacing the largely RINO losers, both parties are now more conservative.
I rather doubt the newly elected Dem "conservatives" will be allowed to do anything but toe the party line. And, the caucus being more conservative, the GOP conservatives should be more interested in gridlock than in achieving "bi-partisan accord". At least, if they don't wimp out to the media. But it is an interesting dynamic that could make for some interesting politics down the road.
The last "conservative Democrat" I saw was leaving the party for retirement in Georgia, Zell Miller. Do you seriously think these people will for one second hew to any "conservative" principles when Fraulein Pelosi reads them the Nazi Party Bylaws upon their being sworn in?