So since Saudi Arabia is the land from where Islam sprang, it justifies the ban on all other religion? Another poor cop out, the only one with bias here is you, not me. You see the fallacy in Angola banning Islam, but you don't see the fallacy in Islamic countries banning and restricting other religions, that right there is your bias.
Don't get me wrong, I don't think this is good move by Angola, at all, but at the same time, I think what certain Islamic countries do is wrong as well. Unlike you, I realise that both are the two sides of the same coin, the coin of religious persecution and discrimination.
Just like there are many Islamic countries which give freedom to other religions, there are many Christian countries which give religious freedom to Muslims. And these are not few examples from here and there, there are many Islamic countries with institutionalized persecution and discrimination against other religions.
Be the change you wish to see in the world.
See that I have no issue with, it just shows that you are not biased