Obamacare was both sides of the aisle coming together. It's a repackaged version of the proposed Republican 1993 HEART Act (including the individual mandate).
True - but that is completely independent from the fact that the ACA was the Republican healthcare reform model (see Romneycare). The Republican Party went completely at war against President Obama regardless of whether or not he was proposing solutions they explicitly supported (in the past) or actively designed.