I have read that in other to get Israeli citizenship you have to cancel any previous citizenships. Source: https://www.gov.il/en/service/request_for_citizenship_of_a_person_who_holds_pemanent_residency
Israel might play this even harder and say say remainder of people (50% as you say) also should loose it in order to stay in Israel.
Actually I once applied for a citizenship in another country. what the Country can do is to ask you to request your original country to delete your citizenship.
I have read that in other to get Israeli citizenship you have to cancel any previous citizenships. Source: https://www.gov.il/en/service/request_for_citizenship_of_a_person_who_holds_pemanent_residency
Israel might play this even harder and say say remainder of people (50% as you say) also should loose it in order to stay in Israel.
In theory, but Israel doesn’t decide even if they “canceled” the other citizenships, only the other country decides that.
Actually I once applied for a citizenship in another country. what the Country can do is to ask you to request your original country to delete your citizenship.
And many countries will accept it