So just to be clear, the graph is not real. It's not just the flavor text that was added to make it a meme, the lines are just drawn in too. So much about this not believable, like that close to 0 percent of democrats thought it would be a good idea to bomb Iran a day before it was bombed? (Come on, it was much higher than that). And then they polled repeatedly over the next few hours and just over the course of that day it jumped to 25% but then dropped back down to zero after it happened. Yeah, nah.
The sentiment may be correct but to people in the comments taking this as valid information, please consider these kinds of things more carefully.