Let me try and make it more clear(Original post by Shirogirl)
What bothers me the most is the bitterness my family will feel towards me. I can't see them depressed and disappointed in their old age. Any advice for maintaining good ties?
You can't convince them. They are not able to accept that you rejected their religion on evidences, because if they were to accept that, then that means that their religion CAN be rejected by an intelligent person on the basis of evidence. They can't allow themselves to believe that because they need their religion to be true. They need to believe that there is substantial evidence for their religion.
Their world would fall apart if they realised it wasn't as they think it is. Too much is at stake for them. It is very very hard to lay your religious beliefs on the line, TRULY look at them from a critical distance, because you have so much tied up with that religion. It gives you emotional support, it forms your entire worldview, it is part of your self-identity and it is the most important element of your life. It is frightening to even consider that it may be false. So people are not able to see the evidence you put before them, because they are not looking at it objectively at all.
You can only have any effect with your evidences on those who are truly willing to look at them with true objectivity. But that person is rare. They are out there, obviously you were able to do it. So you can only do so much in convincing people.
Loughborough at number one