Why do people think the Bush tax cuts promote jobs?

Are those not the same tax cuts that got us in this mess and were they not in place when unemployment rose to 9% and are they not still active yet no more jobs are being produced. so isnt it time to give up that farce and jump on another train I mean Im tired of the trickle down effect besides with all the union busting and GOP attacks on medicaide I dont think we will have to worry about them after 2012