Are you serious?
Look at recent history, the Turks committed genocide on the non Muslim Armenians, in the Middle East the Muslim Lebanese killed and drove out the Lebanese Christians, Egyptian Coptic Christians are still persecuted to this day, in Pakistan Christians are discriminated against, even in the West Muslims wage war against non Muslims in various way, lets not forget the Taliban in Afghanistan, Muslims in Indonesia who routinely are violent against non Muslims and Muslims who do not share their perspective, then there are the fights between Shiite Muslims and Sunni Muslims, so it is obvious they cannot even tolerate each other let alone outside religions.
Let us also note that non Muslims have to pay a tax to live in a Muslim country.
And Christians and Jews alike have also heavily persecuted each other and those of the Muslim faith. And I'm sure that even Muslims have to pay taxes in Muslim countries, just the same as citizens of other countries pay tax. You're discussing politics rather than religion littlerooster. And yes, even various branches of Christianity cannot live together in harmony, so do not single out Islam when other faiths are guilty of the same faults, if not worse.
As far as I can gather, Islam, like every other religion widely practised, has fractured and split over time, in much the same way as the Christian and Jewish sects as differences in interpretation have emerged, and like many Western leaders, I'm sure there have been Islamic leaders who have twisted the Qu'ran for their own ends.
I can't comment very specifically on these various sects, but as I understand the two oldest and best known are Sunni and Shi'a, referred to sometimes as Shi'ite. Every sect, naturally, believes that their interpretation of Islam is the true and correct way, as the Prophet intended Allah's followers to live and worship, just as Catholic, Protestant, Orthodox, etc Christians believe that their version of Christian teaching is correct.
I believe it is generally understood that Sunni is the equivalent of 'orthodox' Islam. It's followers keep the teachings of the Qu'ran as close to word for word as possible. It is my understanding that Sunni Islam teaches benevolence and tolerance as wise qualities to possess, which may in part explain their more accepting attitude towards non-Muslims.
Shi'a Islam is a branch-off of the original, Sunni Islam. This most well-know sect split off from the main faith after disagreements regarding who should succeed the Prophet in spreading the word of Islam and enforcing its teachings, much in the same way that the Protestant Church split away from the Catholic Church. As far as I am aware there are no major differences in belief between the two but differing interpretations of certain aspects of the Qu'ran have resulted in different practises.
Another sect is known as Ba'ath Islam, which fundamentally believes, unless my sources are mistaken, that all Islamic countries should unite to become one, all-inclusive Muslim nation. The well-known Iraqi President Saddam Hussein claimed to be of this sect, though my personal opinion is that he merely exploited the growing Ba'ath movement to justify his invasion of Kuwait in the first Gulf War.
That's the extent of my current knowledge without delving into my books for more detailed answers. Naturally if anything I have said is incorrect I welcome feedback on that.