IF a theory is coherent enough and can explain all the evidence that ToE currently explains, then the grand majority of Biologists would be thrilled to allow it to be taught. The battle isn't so much to make sure evolution is taught at all costs. The battle has mostly been about people trying to circumvent peer review and misrepresent what science actually says about ToE, the Big Bang, Geology, etc. Science will accept alternate theories that do a better job explaining the data, but until they are coherent and pass peer review, they are usually just concepts. Like Panspermia. They really aren't serious notions, just hypothesis's based on possibilities.[/quote
Because religious freedom is guaranteed by the Constitution, creationism cannot be taught in science classes in public schools. Being faith-based, it is a religion, not a scientific theory. There is no reason it can't be explained in a course on comparative religions, along with Christianity, Islam, Judaism, Wicca, etc. It just can't be presented as truth.
Because evolution is supported by a mass of evidence, including experimental evidence (such as the evolution of a new organ in lizards, and the creation of new species) it is a valid scientific theory.
Alternative theories to Darwin's have been repeatedly proposed. One of them, the Modern Synthesis, combining Darwin's five points and genetics, is the currently accepted one. Darwin's original theory has been supplanted by a more complete and accurate one. This is how science works.
From the 1930 to the 1950s, the Soviet Union banned Darwinian theory, and as scientist and human rights activist Andrei Sakharov pointed out, it severely damaged Soviet Biology, which is still catching up with the west.
Great Britain has no legal tradition of religious freedom, so it would not be unconstitutional for Great Britain to allow any religion, including creationism, to be taught in public schools.
Yes, I know that Great Britain has no written Constitution. George III remarked that he had never seen the English constitution, but then he had never seen God either, and he knew God exists.