Have you seen Ben Stein's movie "Expelled"? There is more than one whistle-blower disputing the smug certitude of the ToE party. Is it your claim that contrary views are not being suppressed? Court cases have been fought to keep alternatives to the ToE out of classrooms. Many churches, the media, most scientists, and most educators beat the ToE drum ceaselessly, proclaiming "evolution is a fact. Question not."
As to the motivations for belief, many do not want to believe what the evidence is saying, that there is a Creator to whom we are responsible. (Romans 1:18-20)
Richard Lewontin wrote that many scientists are willing to accept unproven scientific claims because they have a prior commitment, a commitment to materialism. Lewontin writes, we cannot allow a Divine Foot in the door. (NY Times Review of Books "Billions and Billions of Demons" by Richard C. Lewontin,1/9/97 pp.28-32
Sociologist Rodney Stark is quoted in Scientific American: Theres been 200 years of marketing that if you want to be a scientific person youve got to keep your mind free of the fetters of religion. He states that in research universities, the religious people keep their mouths shut." Hmmm... I wonder why...
Scientific American,9/91 p.91