If someting is to be 'bi=partisan' it must be something that BOTH sides support. This means that the Dems, to be 'bi-partisan' have to give the GOP something theycan support. if the GOP is only presented with bills that contain nothing theycan support, then you cannot blame the GOP for not being bi-partisan.
Does this differ from the Democrats?The might not show it, but its there. The Republicans want to secretly turn the entire country into Republicans and drown out the voice of "what they think is wrong," a mentality which is itself very wrong.