One possible reason that people are opposing evolution may lie in their perceived understanding of the concept of natural selection.
This is a rather complex subject but it is important to understand the development of the idea. It can be argued that it is linked to people's view of matter. The most common view of matter today is a mechanistic-cum-atomistic view of matter. It can basically be summed whereby matter can be described as:
1) Homogeneous and of the same nature and only distinguished by quantitative differences of size, shape, mass, spin, tension (string theory) and motion.
2) Having no intrinsic finality or goal-directedness.
3) At the fundamental level has no conscious activity.
4) In ancient Greek atomism there are two fundamental principles, atoms (Greek = átomos) and the void. These can be analogous to todays “fundamental particles” and “empty space-time” respectively.
According to this view, change is described in terms of the arrangement and rearrangement of these fundamental principles. Paley's watchmaker analogy was the basis for the argument from design whereby reality was like a machine composed of mechanistic-cum-atomistic parts with no intrinsic relationship between them. The designs that were observed in reality were argued to be imposed from an outside agent as chance can't explain it. God, according to this view is some sort of machinist.
Darwin came along and developed his concept of natural selection and attributed the designs in nature to be the result of natural selection. Many people of course see natural selection as a refutation of the idea that the universe has a machinist that moved the mechanistic-cum-atomistic parts into designed structures. No designer needed.
Jerry Coyne for example says:
As natural selection demolished Abrahamic faith’s most important empirical evidence for god, the faithful simply regrouped and, after a frenzied confab, began claiming that, don’t you know, natural selection was not only god’s tool for making life and humans, but it was in fact a much better tool than simply creating ex nihilo.
So natural selection is sold by some as though it refutes the design argument. IDers of course disagree, they at least agree that natural selection is a causal factor but argue that it is not enough.
It is however important to realise that Paley's watchmaker argument and the arguments from IDers ARE NOT the same as the traditional teleological argument as defended by Aquinas' Fifth Way.
Darwin saw natural selection as an actual force or cause. Darwin was also a teleologist precisely because of his views related to natural selection and this appears to be how the OP understands natural selection as well.
This has been discussed here before. Now the teleological argument relies on the reality of natural ends or final causes and natural selection (as Darwin understood it) not only preserves elements of Aristotle's final causes but also Aristotle's formal causes. The difference is that Aristotle's formal and final causes are intrinsic features of substances and substances on this view where NOT mechanical parts of a machine whose actions were attributed to an outside/extrinsic force. Darwin's idea of natural selection seems to be some sort of force that is part of reality but extrinsic from the substances (or parts as per mechanistic-cum-atomistic view of matter) of reality.
It is thus important to note that the description of evolution via natural selection is very much compatible with Aquinas' Fifth Way and the teleological argument. There are different approaches to the concepts of matter and teleology (
see here for example):
It is also important to realize that evolution itself is not an argument against the existence of God. Evolution is just another name for change. One of the arguments for God relies on the reality of change. See Aquinas' first way. So evolution or change itself is not an argument against God and is quite compatible with the existence of God.