Excuse me?
Your examples are telling.
The BNA Act of 1867 is the supreme law of Canada (Now the Constitution Act of 1982, which is simply the BNA Act with the Charter added)
the Constitution of the United States was adopted in 1789, and is the Supreme law of that country.
Charters matter.
If you knew anything about Islamic philosophy, you would know that making treaties with the infidel is completely acceptable when advantageous to the Muslim, but the ultimate purpose is never to be forgotten:
War is eternal
The fact that Islam legitimises deceit during war cannot be all that surprising; strategist Sun Tzu (c. 722-221 BC), Italian political philosopher Machiavelli (1469-1527) and English philosopher Thomas Hobbes (1588-1679) all justified deceit in war.
However, according to all four recognised schools of Sunni jurisprudence, war against the infidel goes on in perpetuity, until "all chaos ceases, and all religion belongs to Allah" (Quran 8:39). According to the definitive Encyclopaedia of Islam (Brill Online edition): "The duty of the jihad exists as long as the universal domination of Islam has not been attained. Peace with non-Muslim nations is, therefore, a provisional state of affairs only; the chance of circumstances alone can justify it temporarily. Furthermore there can be no question of genuine peace treaties with these nations; only truces, whose duration ought not, in principle, to exceed ten years, are authorised. But even such truces are precarious, inasmuch as they can, before they expire, be repudiated unilaterally should it appear more profitable for Islam to resume the conflict."
The concept of obligatory jihad is best expressed by Islam's dichotomised worldview that pits Dar al Islam (House of Islam) against Dar al Harb (House of War or non-Muslims) until the former subsumes the latter. Muslim historian and philosopher, Ibn Khaldun (1332- 1406), articulated this division by saying: "In the Muslim community, holy war [jihad] is a religious duty, because of the universalism of the Muslim mission and the obligation to convert everybody to Islam either by persuasion or by force. The other religious groups did not have a universal mission, and the holy war was not a religious duty for them, save only for purposes of defence. But Islam is under obligation to gain power over other nations."
This concept is highlighted by the fact that, based on the ten-year treaty of Hudaibiya , ratified between Muhammad and his Quraish opponents in Mecca (628), ten years is theoretically the maximum amount of time Muslims can be at peace with infidels (as indicated earlier by the Encyclopaedia of Islam). Based on Muhammad's example of breaking the treaty after two years, by citing a Quraish infraction, the sole function of the "peace-treaty" (hudna) is to buy weakened Muslims time to regroup for a renewed offensive. Muhammad is quoted in the Hadith saying: "If I take an oath and later find something else better, I do what is better and break my oath (see Sahih Bukhari V7B67N427)."
Islam's doctrines of deception :: Middle East Forum