The disclosure this week that the ANC intends to review South Africa's dual citizenship legislation is deeply worrying. The stated purpose of the review is to prevent Israeli citizens living here from serving in the Jewish state's armed forces, but it appears that the proposed policy changes would extend far wider than that.The Sunday Times quoted Obed Bapela, head of the ANC national executive committee's subcommittee on international relations, as saying: ''The question is to see if the world still needs this model of dual citizenship . We say that, in this new world order, people should just say 'I am a citizen of South Africa and I pledge my allegiance to this country'. ''Bapela's comments, which are in line with the ANC's criticisms of the Israeli government's treatment of Palestinians, triggered an outcry - and not just from Jewish citizens incensed that their loyalty to South Africa was being questioned.Any attempt to deprive South Africans of their citizenship would affect millions of people - the vast majority of whom have nothing to do with Israel - who hold two passports.The proposed review, which Bapela said had been discussed at the party's lekgotla in July, and which would be discussed again, would almost certainly run foul of the constitution.Scrapping the present dual citizenship model, which works well in a globalised world, would also cause incalculable harm to the economy. Such a move smacks of the isolationist approach of the apartheid government.The blunt-instrument nature of the proposal - we already have a law prohibiting citizens from taking part in foreign military activity - echoes the government's tough new visa regulations, aimed at curbing child trafficking, which are costing the economy billions of rands in lost tourism revenue.Sometimes the juice really just isn't worth the squeeze...