Actually Ayla, they are. Unless it's a war started while a Republican is president. I'm not calling out Democrats in general, just the Democrat politicians.

You can't look at just the past decade to be fair. Let's see... in the 20th Century...

Woodrow Wilson - WWI
Franklin Roosevelt - WWI part 2
Harry Truman - Korea
John Kennedy - Vietnam - the beginning (but it might have been Ike... depending on your perspective. But Kennedy definitely escalated Nam when the French left)
John Kennedy - Bay of Pigs - the closest we came to a nuclear war
Lyndon Johnson - Vietnam - the escalation part 2

I'll give you Reagun for Grenada and
Bush Sr. for Iraq part 1
and the Shrub for Iraq part 2... but I think that's the only reason the Democrats are so antiwar right now. The Republicans are stealing their thunder......