Most theists accept the findings of science. It's an attempt to try to pretend that evolution is a religion and that Darwin was some kind of god to those who accepted his observations. As far as disproving evolution, that's kind of difficult since evolution is a directly observed phenomena. One would have to discount entirely the change in allele frequency in a population over time which is observed in species in the span of human lives. One major step toward disproving evolution would be to find fossils in the earth's strata which are out of sequence in its geological collumn.
Evolution is both a fact and a number of closely-related theories.
Evolution is a directly observed phenomena not subject to belief or disbelief. Evolution is also a number of theories which seek to explain how evolution takes place. It's a minor variation on the theory which has predominated paleontology, biology, and evolution for several decades. It's the same for physicists working on gravitation. The fact that gravitation exists is undeniable even though there are two theories of gravitation which physicts argue over.