Why are there so many misunderstandings about secularism in the Arab world (and parts of Western societies)?

I stumbled upon this remarkable website which is about freedom and democracy in the Arab world including the peaceful co-existence of religious and non-religious people. Egypt is a good example of what can go wrong.

http://freearabs.com/index.php/tabbed-articles/what-we-stand-for

”Advocate secularism as what it is: institutionalized freedom of choice.
Millions of Arabs have internalized the notion that secularism is tantamount to faithlessness, and is all about demonizing Islam and promoting a dissolute way of life. This is certainly not the working definition for Free Arabs. Secularism is a legal, social and political framework that is built on universal principles of human rights, that guarantees the right to freedom of religion—from straightforward atheism and iconoclastic modernism, all the way to (and including) devout piety and traditional way of life. The contributors of this site represent the full gamut of belief, but have in common the commitment to respect differences of belief and lifestyle.”

When looking at the website it reminds of some of the discussion going on in the US. Some people of the Religious Right resemble those of the Muslim Brotherhood trying to demonize secularism. But secularism includes the right to believe. Why are there so many misunderstandings about the terms secularity and secularism? Are we talking about deliberate misunderstandings?

I also stumbled upon this remarkable 12-year-old Egyptian boy, who explains what the Muslim Brotherhood is all about. There’s also a video with English subtitles. Worth watching.

http://news.rapgenius.com/Ali-ahmed-egyptian-12-year-old-destroys-muslim-brotherhood-lyrics