How to prevent a crisis at Stormont in the future.

The problem is that this is all set out in the Good Friday agreement and nobody wants to tinker with that.

This kind of problem is common when you have a country/state that went through a bloody tribal war and eventual peace agreement. Bosnia and Lebanon similarly have systems in place that guarantee certain powers or representation to different demographic groupings. The result is a sort of quasi-democracy that nobody really believes in but also the fear of the past forms an impediment to any real reform.

I think the long term hope in Northern Ireland is that the small but growing group of the population who don't identify with either sectarian grouping eventually come to form the majority of the population. Perhaps then they can finally move beyond sectarian politics. Might be waiting for a long time for that though....

The only party who actively still block rights considered normal elsewhere and who refuse to properly powershare are the DUP.

They block those rights based on fundamentalist religious beliefs and cultural supremacy beliefs.

It should also be noted they block those rights even though they have been agreed to by a majority of MLA's and via other GFA processes.

While SF do have an open policy of wanting a UI they are simply not comparable. They do not have any policy that blocks the rights of the British identity or otherwise.