Israel has identified 20 activist groups from around the world whose members will be banned from entering the country over their calls to boycott the Jewish state, stepping up its fight against a movement it views as a serious threat. Israel last year enacted a law that would ban any activist who knowingly issues a public call for boycotting Israel. <br/><br/>The list made public today, which includes a Nobel Peace Prize winning organisation, follows up on that legislation and could impact thousands of people if it is enforced. Strategic Affairs Minister Gilad Erdan said in a statement that the boycott organizations must know that the state of Israel will act against them.