even if the "cool god" of kabbala or chassidism became mainstream, most secular jews would not be motivated to live an observant jewish life. because you need to actually believe in this god in order for him to motivate you to practice your religion. the issue is not whether god is cool, uncool, good, or bad -- its whether you actually believe in him or not. I think faith actually makes a difference. if you don't believe all the stuff the torah is saying about god, if you dont truly believe there is one just and perfect god who created the earth, etc., well then only guilt and or nostalgia will motivate you to live jewishly, and thats not strong enough motivation for most.