Question 3 is wrong.
I've heard the argument that an unfertilized egg is an aborted baby, but by that logic you'd have to count every sperm that doesn't make it to the egg, since both the sperm and egg have 23 chromosomes. When the chromosomes combine, the babies life begins. From that point, the babies has 46 chromosomes, a unique genetic code. Whether it's the woman's right to abort that baby is a different debate...
I don't think the appeals to faith are a bad thing. Religion is something that separates this country from other western democracies, and is crucial to our culture. Both men made appeals to the faithful, but Bush seemed more sincere about his faith. I felt like Kerry's speeches about faith contrasted starkly with some of his comments about Catholicism during his senatorial career.
You're right when you say no man can truly know which path is correct. I believe in Christianity because Jesus was a real man whose miracles and trials were well-documented, but I have to admit the rest is faith.