Hizzoner hit his breaking point after he was contrasted to the liberal mayors of Oakland and Denver — who quickly cracked down on OWS protesters — and critics compared his inaction to the failings of former Mayor David Dinkins…

But sources familiar with Bloomberg’s decision said he also was concerned with public health.

Scabies and lice recently cropped up among those sleeping in Zuccotti Park — and there were concerns that the infestations would grow even worse, said a law-enforcement source.

There also was an increasing numbers of lung ailments caused by constant smoking and the chilly nighttime temperatures, medics who worked on the scene confirmed.

And Hizzoner didn’t like being called out by former Mayor Rudy Giuliani for his inactivity.