Are Christian ethics to rigid for moral decision making ?
I think you are under the false assumption that religions create their own ethics and morals. They do not. Ethics and morals are merely the agreed upon norms of a society and as such they tend to change and evolve over time and by location. For instance, at one time in cannabal tribes in South America it was perfectly ethical and moral to eat humans. And at once time in mideval England it was perfectly ethical and moral for a lord to be the first to bed a new bride in his kingdom. And at one time in the US it was perfectly ethical and moral to buy and sell people as slaves. So religions have never created ethics or morals, they simply borrow whatever current ones fit into their dogmas. So you should be asking which religion had the most lenient dogma.