Concur with cbg. Whether you're terminated or you voluntarily quit, you're unlikely to receive UI, since you're being dismissed for cause.
In your shoes, I'd make them fire me, then I'd apply for UI. The worst that can happen is that UI says No. You lose nothing by applying.
It's the "at work" part that I find to be a technicality... but, if you take 'technically' for an adverb modifying 'assaulted' -- rather then the entire phrase that follows, I must concede the actuality. ;p
You were in the workplace (the airport) and in uniform. It's completely reasonable and approriate for the airlines to hold you accountable for your behavior under those circumstances.
I see you upside for you to resign. Even if you quit, you're going to have to explain to prospective employers all the circumstances surrounding your resignation.