Bad religion is arrogant, self-righteous, dogmatic and intolerant. And so is bad science. But unlike religious fundamentalists, scientific fundamentalists do not realize that their opinions are based on faith. They think they know the truth.
The facts of science are real enough, and so are the techniques that scientists use, and so are the technologies based on them. But the belief system that governs conventional scientific thinking is an act of faith.
For more than 200 years, materialists have promised that science will eventually explain everything in terms of physics and chemistry. Believers are sustained by the faith that scientific discoveries will justify their beliefs.