There is also the case of old earth creationists, who generally believe in the Big Bang theory but reject the theory of macroevolution of life forms. Hugh Ross would be an advocate of such a position.
As for young earth creationists, it is a distortion to state that they disbelieve the entire base of scientific knowledge. Most have no problem with most of the observations and hypotheses of modern science. But in specific areas, such as macroevolution and the age of the universe, they reject the conclusions of mainstream science because it contradicts the propositions of Scripture: that the universe is of limited age and that the species of life were created by fiat. Granted, young earth creationists have a lot of explaining to do in the area of the physical sciences. However, the fact that they hold a certain body of statements founded in the Bible, to be truer than the theories and laws of scientists does not make them anti-science. Would we say that policemen are anti-gun just because they oppose the use of guns by criminals?
There is no just or reasonable cause to presume that one set of presuppositions are superior to another based on whether or not a particular theory is accepted or rejected.
Uh, I think you just stated that the are anti-science.