Why have you gone back to abortion and euthanasia? These are not scientific questions, they are ethical questions. They are not scientific questions because the science of how to terminate a pregnancy or how to perform euthanasia is well known. If we think these thinks are ok or not, well that is a moral question. RE in secondary schools specifically teaches people to approach ethical questions from the point of view of different communities. School has already got this one covered.
What exactly is it you want teachers to do? Give a lesson on evolution and then, unprompted, say "I'm going to spend 15 minutes telling you a story which is a different viewpoint"? The kids have already learnt about Creationism in RE. If they want to ask a question, they can.