I'm not sure what besides historical amnesia or relentless propaganda created the myth of liberal Democrats being the "party of peace" - Democrats have gotten us into more pointless or questionable conflicts during the 20th century than Republicans.
Yeah their base doesn’t like it though and you’ll see many liberals upset on twitter at the latest manoeuvres in the House to box Trump in.
Of course the Democrats are owned by the Military Industrial Complex that Ike warned us about just as much as the GOP