Angola reportedly bans Islam. How can they do that though?

Shouldn't there be freedom of religion to every
citizen of a country, so how can Angola do this? If
reports are to be believed then the Southern African
country has become the first country in the world to
ban the Islamic religion. According to multiple
reports coming from Angola, Mosques in the country
have been closed down and some even destroyed.
The Guardian reports that on November 22, the
Angolan Minister of Culture Rosa Cruz e Silva said
that "the process of legalization of Islam has not
been approved by the Ministry of Justice and Human
Rights and so their mosques would be closed until
further notice."
Does a religion need to be legalized? The minister
also said that the closing of mosques was done in a
move to stop so-called 'illegal religious sects.' Under
new laws in Angola, many religious sects have
suddenly become criminal.
Yesterday November 24, Angola President José
Eduardo dos Santos said that the country is working
toward putting an end to Islamic influence in Angola
once and for all while the Governor of Luanda, Bento
Bento, said that "radical" Muslims are not welcome
in the country and that the Angolan government will
not be legalizing mosques or other places of worship
for Muslims.
LIB