Durban – President Jacob Zuma’s son on Wednesday warned South Africans to guard against non-governmental organisations which were "devils in a sheep skin".In a statement, Zuma’s eldest son, Edward, echoed sentiments made by State Security Minister David Mahlobo in his budget vote speech on Tuesday. "Not everybody is our friend. The forces that are opposed to us are hard at work. Our NGOs play an important part in South Africa, but there are those who work to destabilise the state," Mahlobo reportedly told MPs. Zuma said: "As a country, we are facing a situation where the youth and people in general are being told and fed lies and misinformation by all NGOs that are used by agents of the West to start a revolution in our country."They have done it in many other countries around the world and we should be careful of them because they are devils in a sheep skin, we should not be fooled by... rebels of our hard-earned freedom, instead their calls should fall on deaf ears."Zuma continued his attack on business tycoon Johan Rupert, against whom he recently laid a charge of corruption at a Nkandla police station.He hit out at Julius Malema, Rupert, Trevor Manuel, Maria Ramos and "many who call themselves various names".He said some people did not care about the country and were only interested in destroying it. "They have never had the interests of the country and its people, rather they have been part of those that destroyed our country with the apartheid regime. For example, the Project Spider Web should be able to clarify all one has suspected all these years once its content is investigated."He said the "unholy alliance" was a mission founded by those who did not approve of the relationship South Africa enjoys with other BRICS countries. “Hence, President Zuma is their enemy number one because he is not controlled like those who are now making noise today, and those who want to forcefully remove the existing democratically elected government.”Zuma also took a dig at former Congress of South African Trade Unions (Cosatu) general secretary Zwelinzima Vavi, saying: "South Africans must resist and not just stand and watch our country being destroyed by Zwelinzima Vavi and his crew. True sons and daughters of this beloved country should defend it at all cost." Vavi was among many prominent people who recently called for Zuma to resign following a damning Constitutional Court ruling which found that Zuma had flouted the Constitution when he ignored Public Protector Thuli Madondela's remedial action on the non-security upgrades done at his private home in Nkandla.