People will believe the polls that confirm their worldview.
Why? Lack of intellectual laziness and/or the inability to discern the poll methodology and results due to low intellect.
People will disbelieve the polls that contradict their worldview.
Anyway we know polls are all over the place due to: 1) impossibility of getting a representative sample size now that everyone screens their calls and 2) nobody feels obliged to be truthful answering poll questions.