"Which is more rational to believe without evidence: Something that makes you happy or something that makes you laugh?" -- Equal.
"Dawkins can't prove that God doesn't exist, yet he's happy to point the finger and claim, they're delusional." -- He doesn't need to. See above. Also, see your own B. Russell's quote: "...as though it were the business of sceptics to disprove received dogmas rather than of dogmatists to prove them. This is, of course, a mistake."
"karma for instance is practically Newtonian" -- I disagree.