Why are anti-Trumpers so ignorant?

Why are anti-Trumpers so stubbornly ignorant? You can present them with facts to disprove their allegations. You can direct them to further information. You can try to educate them and get them to think. They still cling to the same misinformation spewed out by the MSM, and operate on their emotions rather than rational thought. It causes me to despair for the future of our country.