Jews weren't kicked out of their countries, they left by their own choice to Israel, and effcorse by Israel seduction (offering money, free homes, lands, etc...)
The invitation isnt effcorse, a desire to do the good thing, politics is all about interests, first, that will gain likes from the international community, also in case Tunisia opposed to Israel policies and went to help Palastinians to establish a Palastinian state, it also makes a strong point against Israel, in case Israel accused Tunisia of being radical, and obpressing jews and such things, here it comes the role of the Tunisian jews (who already refused Israel invitation to leave Tunisia immidiatly and go to Israel by saying that Tunisia is their home and etc...), and in that case, Israel will be just facing, a secular, democratic country, even if not totally secular, it's a democratic country that all it's citizents (no matter what is their relegion) are equal and have their full rights, so they will not find the excuse like of Iran (even that there are alot of Iranian jews living in Iran).
Jews, are not Israel, and Israel, is not jews, Israel is a colonial entity, and many jews who lives in it, are seduced to move there, just saying that we're not against jews in anyway, but we are against Israel.
It's also kind of a way, to invite them and invest in Tunisia, and to also gain more support from the west.
If the other emerging democratic arab countries do the same, consider Israel in a threat (for not finding some relegion or anti-semetism execuses to fight those arab countries, because the international community, and also the jews from those country, will be an obstacle in their way)
The newly elected president Moncef Marzouki, have been accused of being anti-semetic or anti-jews in a newspaper, because he refused to meet a zionist american poltical group related to Israel (or something like that), so he did that step to proove the other wise, it's like, two birds in one shot, or many birds. (that's what I think)
It's a positive moove actually.
(P.S.: Israel project (or more to be as a dream) is to establish the Great Israel, wich extends from the Nile to Furat (a river in Iraq) )