I think alot of scientists are upset that the majority of the public does not understand the theory which has more to do with the quality of science education. Looking at these threads gives example after example of a complete misunderstanding of the theory. Among professional biologists more than 99% accept the theory, and their research is guided by the theory so there is not a problem within science. We are free to believe what we want, but it would be better if we understood what we are disagreeing with.
The reason that scientists are upset about ID and creationism in the classroom is that theseclaims are not science. The strength of science is -evidence overcoming belief.
When we allow belief and faith to overpower evidence then science disappears.
Imagine now if a drug company ignored the results from clinical trials and went ahead with their belief that their medicine was safe. Would that be a good thing? This is exactly what some people want to do with our science classes, insert claims not because of evidence but because they are strongly held beliefs !
Evolution describes our ancestry- and the ancestry of all species.
How that affects "how we got to here from there" is left to the individual.
A similar situation occurred during Galileo's time-remember ?
Many people had a rough time with the idea that the Earth was not the center of God's creation. If we were not in the middle of the solar system- they thought- then the Earth was just another rock circling the Sun like the rest of the planets. We see something similar within the creationist movement. You will often see creationists saying that "evolution says we are just animals". I think this is directly comparable to "Galileo says the Earth is just another planet".
Evolution deals with both NOW and THEN. In the now, evolution studies the emergence of antibiotic resistance, pesticide resistance, herbicide resistance, new infectious agents, ecology, and human guided evolution projects that are looking for biological solutions to certain problems -like bacteria that break up petroleum products at spill sites and etc.
If mice and humans were created separately there is no reason that their phsyiological responses to treatments would match ours. However, the theory of evolution states that we share a common ancestor with all mammals. Therefore, homologies in physiology can be used to add certainty to research into medical treatments through animal models.
As Theodosius Dobzhansky says, "Nothing in biology makes sense except in the light of evolution." He is right. Biology without evolution is stamp collecting.(cool comparison-not mine-stole it

)
Evolution ties together the facts of biology. Without evolution those facts would belike solitary stamps in a portfolio.
Evolution is a very complicated theory and there were many proto-human types. For example we thought we absorbed Neanderthals but have very little genetic links. But we lived beside each other.