What prominent democrat today is advocating for WW3? Or, let's make it even simpler for you to prove your point: which political is for making Ukraine a no-fly zone (which could easily start WW3).
But...but...but: meme?!?!!
Yup, that's your problem right there - the world is awash with simpletons, some of whom (like Trump) are able to get into positions of power and authority.
Simpletons are easily swayed by propaganda. A couple of pictures, ideally showing a strongly emotional facial expression, or an image of sex or violence, and fewer than two dozen words (because reading is for losers, just like thinking), are all that is required to get a complete understanding of any issue, no matter how complex or nuanced.
People who ask you to put in effort and actually think about stuff are never going to be as popular as people who just provide you with a cartoonish direct emotional stimulus.
And popularity is the exact same thing as truth. This is, after all, a democracy.