I do not think that “most religious people” deny evolution. Many do, of course. But many religious people accept it. Conversely, many scientists deny evolution as well. And of those scientists that deny it, some are religious and some are not.
Scientists, while obtaining their doctorates, were being taught evolution while receiving their education. But interestingly, as they began to practice in their respective fields, some began to see serious issues with evolution being proffered as an explanation of the origin and development of life until some reached the point where they began to doubt, then reject. Their rejection is based on their further education and not any lack of it. Their rejection is based on understanding scientific discoveries rather than a failure to understand them.
In short, you have many in both camps – scientists of every academic flavor – religious and not religious – denying evolution. At the very least of it, many scientists recognize the very real issues with accepting evolution as an explanation. They no longer gloss lightly over the difficulties. Some people dismiss religious people who reject it as “uneducated and unable to understand.” On the other hand, those scientists who reject evolution are often dismissed as ‘not really scientists . . . as if the doctorates in their respective fields are just pieces of paper from grammar school graduation. Even here in responses to your question, people are dismissing religious folk as stupid, uneducated, retarded, part of a lunatic fringe, anti-science, and such. But ad hominem attacks are not persuasive, merely insulting, and very telling.