Global food giant Mondelez is seriously violating the right of workers to organise in Egypt and Tunisia, unions said Friday, lamenting that the company's actions were undermining hard-won advances during the Arab Spring uprisings. Mondelez, which until last year was known as Kraft Foods, has cracked down on the rights won by Egyptian and Tunisian workers during the 2011 uprisings to organise in unions, charged Ron Oswald, the head of the International Union of Food Workers (IUF).