The Arab writer is saying "We were here first." How is his statement relevant to the article except as an implicit claim to seniority?
It is also curious that the Arab writer says "years before the State of Israel was established" -- not centuries before. The schools formed when the area flourished due to a flood of Zionist Jews returning to their ancestral home. Arabs moved to the area because of the economic boom. Before the Zionist Renaissance, the area was a wasteland.
The writer should be grateful to live in Israel instead of Syria or Iraq, or wherever his ancestors came from mere decades ago.
If you are not aware of the anti-Semitism among many self-described Arab Christians, here is a recent story for illustration:
http://www.freerepublic.com/focus/f-news/3202955/posts
There are certainly real Arab Christians in Israel, but there are many counterfeits.
No doubt. Take care, then, not characterize them all according to a single negative stereotype.