The Koran states that there are four ways in which infidels should be treated.
1. That they should be converted to Islam, OR
2. That they should be conquered and made to pay tribute, AND
3. That they should be oppressed, e.g. in the exercise of their religion. Examples:
a. They shall not be permitted to build, or expand houses of worship and related properties.
b. They should wear identifying clothing or emblems so that the faithful can readily identify them (e.g. like the Nazis required the Star of David)
4. OR that they shall be slain - - and the preferred method is by beheading.
Yes, all of this is actually in the Koran. So if the Koran is the literal word of Allah, and if you are faithful to Islam, then it is your duty to treat infidels accordingly.
By the way, the Koran also allows/encourages Muslims to lie to infidels to further the faith and the objectives of the Ummah (the Muslim community).