This is a bold statement without the data to back it up. I wish it were the case but I don’t think so.
Does this study say anywhere how the sample size is distributed among party affiliation? How many dems, reps and other?
The stats throughout basically say that almost all dems disagree with the war and most republicans agree with the war. If there are more dems in the study than reps then the assertion that most American disagree with the war is wrong unless they’re saying that most Americans are dems.