ISLAMIC SUPREMACISM is the belief that Islam is superior to other religions, cultures, and governmental systems, and the belief that Islam's superiority entitles Muslims to dominate, control, and rule non-Muslims.
Islam is a supremacist religion. The Hadith and Qur'an command every Muslim to strive until Islam dominates all other religions. The Qur'an says very clearly that the only legitimate form of government is Allah's. According to mainstream, well-established Islamic teachings, the goal of Islam is to make the whole world submit to the law of Allah (Shari'a).
If Islam is an inherently supremacist religion, then the term "Islamic supremacism" is redundant. Simply "Islam" will do. But I often use the term "Islamic supremacism" rather than simply "Islam" because first of all, most people don't know Islam is inherently supremacist. So if I say something critical of "Islam," some people will immediately stop listening because I am clearly a bigoted Islamophobe, or they think I must be ignorant if I'm implying "all Muslims are terrorists."
The use of the term "Islamic supremacists" when talking about Muslims waging jihad against non-Muslims, prevents this reaction and allows the uninitiated to listen.
Most people believe Islam has been "hijacked" by a small percentage of extremists, and they think that's who I'm talking about when I say "Islamic supremacists," so they're comfortable and can listen to the information.
Hopefully, they will eventually learn that Islam has not been hijacked and that the "fundamentalists" are following basic, mainstream Islamic teachings, and that Islam is political at its core. They will hopefully learn Islam not only encourages intolerance and violence against "unbelievers," but commands all Muslims to show their devotion to Allah by fighting for Islamic domination over all other governments and nations.
But in the meantime, by using this term, we can begin the education process.
Another reason to use the term "Islamic supremacism" is to avoid arousing the ire of those who call themselves "Muslim" but reject the political nature of Islamic teachings.
If you are one of the people who don't know about the supremacist nature of Islam, I encourage you to read the Qur'an for yourself. Some people will say Islam is a religion of peace. Others will say the teachings mandate continual warfare against anyone who resists the domination of Islam. If you haven't read the Qur'an, how can you determine who is correct?
You might think maybe they're both correct. Maybe the Qur'an is written in parables and vague, mystical language; maybe it it full of contradictions, and people can pick and choose passages to justify anything they want.
I have read the Qur'an and I can tell you it is no such thing. It is written in clear and forceful language by a single man. There are contradictions in the Qur'an, but the Qur'an itself tells the reader how to deal with the contradictions (the peaceful, tolerant passages have been abrogated, that is, they've been canceled and replaced by intolerant, violent passages).
Should you believe me? No, you shouldn't. You should read the Qur'an yourself. It isn't that hard to do. Then you will know for sure.
Read about a version of the Qur'an that's readable to Westerners.
Once you are initiated, I encourage you to use the term "Islamic supremacism" when you're talking to people, at least until you discover how much they know. If they know about the supremacist nature of Islamic teachings, you can streamline the phrase by dropping the word, "supremacism."