"Who Is Eligible for Unemployment?
State rules determine who qualifies for unemployment; generally, you must be out of work through no fault of your own, be able and available to work, and meet your state's minimum earnings or job tenure requirements to be eligible for benefits."

From: https://www.employmentlawfirms.com/unemployment/eligible-for-unemployment.htm

So because nurses chose to not get vaccinated when that was policy at a healthcare institution--which is so incredibly obvious it's sad they even have to make a policy for such things, but shows the level of absolute stupidity and selfishness of people who are anti-vaxx)--these nurses are out of work because of fault of their own. The employer didn't fire them. They chose to not do what was required for job. Also, the vaccine was free. So they are just selfish and don't care about vulnerable sick people since they're willing to privilege their anti-science and anti-medical beliefs over vulnerable sick people who could die or be severely debilitated if these or other anti-vaxxer nurses exposed them to covid since they have a much higher probability to be vectors than vaccinated people.