Here is what the directer general of Abu Dhabi Education Council Dr. Mugheer Al Khaili have said about the termination.
"The teachers were terminated for four basic reasons. 1) Reaching 60 yo which is the legal age for retirement. 2) Resignation, 3) ending the contract and 4) Emiratization" [Albayan]
He didn't refer to the Palestinians in anyway though. Albayan titled the article as "Commenting on the termination of the services of 300 teachers. I personally would believe what AlQuds Alarabi news paper have said. There have been a systematic cleansing in the education sector for so long. And since when was turning 60 years old an excuse to terminate the contracts? I've seen workers reaching the age of 70 and they still get an extension for their so called "holy" job and what is holier than teaching? And what did he mean by "ending the contract". As far as I know all contracts for non Emiratis end after a certain number of years so eventually all of the workers will have their contracts ended when they are due so this isn't a termination reason. They simply do not want them.
There is a gap between what the government is trying to show us and what they are doing in reality. What do they really want and what do they fear?
As for Emiratization, give me a break. They don't want Emirati male teachers in the sector for the same reasons that made them kick those Palestinian. There are barely 500 Emirati male teachers comparing to 6,000 Emirati female teachers in Abu Dhabi. Their number is probably way less in other Emirates because most of the Emirati males go to work specifically in Abu Dhabi because they earn like 8k more than teachers from other Emirates.
Here is a video of a peaceful march of 84 Emiratis teachers near the ministry of education building about two years ago who were either kicked off to other ministries or forced to retire from the ministry of Education.