That's just an extreme example. There are many other platform planks they would never be able to implement. I'd prefer a PiS-PO grand coalition.
Who cares about modernity and pro-westernism? Seems like a a lot of Poles do (and myself do care as well).
Well, I guess at this point there are more fundamental disagreements between PO and PiS than between PO and SLD. The latter coalition might now even be more ideologically coherent than the former - not to speak about very bad blood that would have to be overcome if the PO/PiS coalition is to be formed. Having - even if temporarily - formed a coalition with Leper's crowd, the PiS has gone too far off towards its own disreputability.