Two things with that. Residency is not citizenship and it is definitely a problem and unfair that if you leave that area for an extended period (such as overseas study) you could forefit your residency. Most countries have similar rules even my native Australia. But I do not like how the law is applied in Israel. The solution is for East Jerusalem residents to become citizens, this prevents this issue completely. But many don't want to do it for ideological reasons and there is a lot of peer pressure for them not to do it. Some, though, get Israeli citizenship quietly but do not tell their friends and family.

As for the the change in status of Arabic, this was an own goal stupid move. If you are Jewish and like Arabs you should learn Arabic. If you don't like Arabs you should also like it as they are your neighbouring countries, potentially who you could be fighting or whatever. I learnt Arabic, by the way, in fact it is better than my Hebrew.

I speak several languages of nations both friend and foe. I am quite sure plenty of HAMAS have learnt Hebrew too. For societal, political and militarial reasons, Arabic should have been retained.