I'm glad you bring this up.
In Islam, if your father is a Muslim, you are a Muslim period, end of story. Its like in Judaism where if your mother is Jewish, you are a Jew. Obama's father, Barack Hussein Obama Sr. was a Muslim. Another part of Islamic law is that once you are a Muslim, you are Muslim for life. It says in the Koran "If a Muslim discards his religion, kill him".
Now even if you disagree that Obama is a Muslim, you know that he was once a Muslim. When he was a boy, he went to a Catholic school, but was registered as a Muslim. His classmates recall him doing Islamic prayers. Since Obama was clearly a Muslim from his lineage and his practice when he was a boy, and he claims to be a Christian, he has discarded his Islamic religion. Now I have just given the Koran verse that says that a Muslim who discards his religion should be killed. Why hasn't he been the target of ANY Muslim assassination attempts?
Other Islamic apostates such as Walid Shoebat and Ayaan Hirsi Ali have been receiving CONSTANT death threats for their apostasy. Why Has Obama not gotten this treatment from Muslims abroad and domestic? There is a doctrine is Islam called Taqiyya. Taqiyya is a phrase that means lying to non-Muslims. When a Muslim is in the minority, he can use Taqiyya to lie to the non-Muslim "infidels" as they call us to advance the Muslim agenda.
Moammar Khadaffi of Libya has stated that Obama is a Muslim. It is obvious that Obama is committing Taqiyya, and concealing his Muslim faith. Its also why he had a freudian slip with George Stephanopoulos with the phrase "My Muslim Faith". Obama has of course been shown to be a serial liar on the campaign for President, lying on a regular basis.
A Muslim man CAN marry a non-Muslim woman. You're lying about that. And as far as the "Church" is concerned there is no way that "Church" is Christian. That "Church" gave an award to Louis Farrakhan yimach shemo vezichro, a bizarre black Muslim anti-semite.
And just look at everything Hussein has done in office! The first foreign leader he calls up is Mahmoud Abbas yimach shemo vezichro, the Holocaust denying murderer who is responsible the Munich Massacre. The first television interview he gives is not to CNN or ABC or even NBC. He gave it to Al-Arabiya, the Saudi owned Arab television network! He has pledged $20 million for the "Palestinians" in aid, which will undoubtedly be used for Hamas terrorism like the last UN aid that was given to them.
Thats why we say he's a Muslim. Its the truth!