Quite Unnecessary Stupidity

For God's (Christ's fucking) sake why did it take until the year 1425   of the Common Era for the first painting using rational visual perspective to appear?  And, for yet another thing,  why did that farrago of superstition, ignorance, malevolence and mystifaction which is Christianity linger on into the fucking third millennium, disturbing the world's peace by elevating self-hatred and bigotry against others into a philosophy?