Not being religious doesn't not mean having no sense of right or wrong. Nor does it mean that life should be any less valued. Just as I wouldn't call all Catholics paedophiles, nor all Muslims terrorists, I wouldn't suggest all atheists are prospective sociopaths (as you do with your statement about the sanctity of life).

As for euthanasia, it probably deserves a thread of its own. But for the record, I would agree with it with certain safeguards in place. Just because a person is elderly (no) but in the final stages of a painful illness (yes). Not least since I've watched people suffer (and I do mean suffer) through final days and weeks of agony until nature takes its course with the impact that has on the whole family and wider circle.