This is the kind of relationship American Evangelicals long to implement. The Protestant Sacral model is one in which the Church advises the state, it acts as arbiter for official policy.
Poland is probably the most religious country in Europe. Historically the Poles found and maintained their identity in the Roman system while their country was divided and oppressed by Germans and Russians. The Irish responded in a similar fashion in the face of British Imperialism.
Of course the Irish have grown weary of Rome and are beginning to aggressively turn away from its influence.
Poland is heading down the same path. If Roman Catholics aren't genuine regenerate believers they are still in the flesh. Lost people will chafe at God's laws, moral imperatives and obligations.
Roman and Protestant sacralism have at times been able to forge a temporary veneer but it doesn't last.
This sort of political activism while not sanctioned by Scripture to begin with only hurts the 'Church' in the end. Doctrine becomes an element of politics. The Church's authority, whether Scripture or a Magisterium become politicised and cheapened.
It lessens belief, and leads people to question motives. If they're struggling with a political viewpoint, the issues at hand are placed on the table as equal to the doctrinal considerations and issues of the Church. This type of action doesn't increase ecclesiastical authority. In the end it decreases it.
It also hurts credibility because when large segments of the Church population, supposedly professing adherents refuse to follow Church leadership it lessens their authority and doctrine is trivialised... all too easily dismissed.
The greatest danger is theological and thus spiritual. The Church is hijacked by Right wing political narratives. The Church's interests are wed to nationalism. National identity is all but equated with the Church. Sometimes this takes the form of race. I'm not only speaking of White and Black but Slavic and German as well as other examples.
History is subject to mythologising and these lies and misrepresentations are woven together with ecclesiastical themes and the sacral notion of a 'heavenly mandate' or some kind of spiritual destiny.
The prelates of Poland feel rather powerful right now but they're fools. They're literally sawing off the branch they're sitting on. They will not be able to roll back the clock to the 18th century or earlier. Instead they will come out of this weaker than ever.
They should seek counsel from their colleagues in Ireland. The trend was already underway and the paedophilia scandals have sent the Irish Roman Catholic organisation into a tailspin. Poland is but a generation behind.