Earlier quoted context omitted.
> this is about Arab or Christian Israeli citizens This is incorrect. There is no distinction in the law between Arab Israelis and Jewish Israelis. The law applies equally to Israeli Jews who wish to marry a resident of the WB/Gaza, or one of the other countries mentioned in the law.
It would be interesting to see the ration between the Arab Israelis wishing to marry an Arab from WB/Gaza and Jewish Israelis wishing to marry a Jewish from WB/Gaza. Laws make sense in a context of a society.
There is a fundamental difference between a law that prohibits a specific ethnicity from doing X, and a law that prohibits everyone from doing X, but a specific ethnicity/minority is more affected by it than others. The former is pretty much never legitimate, while the latter is often unavoidable, and I imagine exists to some extent in any country with minorities.