wow....its a lot to take in. i hope the bond and love between you and your dad is strong enough to overcome the difference between you two.
My sister recently converted to Christianity after being raised in Islam and we wholly accepted her because of the love and blood. I believe everybody has the right to believe and live the way they desire if its righteous to them.
This is a wonderful thing to read. I agree that we can live good lives regardless of which religious books we read (or don't). And I am so glad you accept and love your sister. Goodness is goodness.