To know that Israel is racist, you need only examine the Israeli laws on immigration, marriage, and real estate. For extra credit examine the words of Israeli officials. It is not exactly a secret that Israel is racist. If the world was not already used to this fact, then this loyalty oath business would come as a big surprise to them. In the end, they know that it is just Israel being Israel.
Passport control employees at Ben Gurion airport to strike between 11 A.M. and 1 P.M. (Haaretz)
from the article: Loyalty oath proves Israel is racist, say Israeli Arab leaders