it seems you have already made up your mind about islam but here anyway.
Rules of War*
[2:190] You may fight in the cause of GOD against those who attack you, but do not aggress. GOD does not love the aggressors.
*2:190 All fighting is regulated by the basic rule in 60:8-9. Fighting is allowed strictly in self-defense, while aggression and oppression are strongly condemned throughout the Quran.
[2:191] You may kill those who wage war against you, and you may evict them whence they evicted you. Oppression is worse than murder. Do not fight them at the Sacred Masjid, unless they attack you therein. If they attack you, you may kill them. This is the just retribution for those disbelievers.
[2:192] If they refrain, then GOD is Forgiver, Most Merciful.
[2:193] You may also fight them to eliminate oppression, and to worship GOD freely. If they refrain, you shall not aggress; aggression is permitted only against the aggressors.
[2:194] During the Sacred Months, aggression may be met by an equivalent response. If they attack you, you may retaliate by inflicting an equitable retribution. You shall observe GOD and know that GOD is with the righteous.
[3:161] Even the prophet cannot take more of the spoils of war than he is entitled to. Anyone who takes more than his rightful share will have to account for it on the Day of Resurrection. That is when each soul is paid for whatever it earned, without the least injustice.
[4:89] They wish that you disbelieve as they have disbelieved, then you become equal. Do not consider them friends, unless they mobilize along with you in the cause of GOD. If they turn against you, you shall fight them, and you may kill them when you encounter them in war. You shall not accept them as friends, or allies.*
[4:90] Exempted are those who join people with whom you have signed a peace treaty, and those who come to you wishing not to fight you, nor fight their relatives. Had GOD willed, He could have permitted them to fight against you. Therefore, if they leave you alone, refrain from fighting you, and offer you peace, then GOD gives you no excuse to fight them.
[4:91] You will find others who wish to make peace with you, and also with their people. However, as soon as war erupts, they fight against you. Unless these people leave you alone, offer you peace, and stop fighting you, you may fight them when you encounter them. Against these, we give you a clear authorization.
[9:36] The count of months, as far as GOD is concerned, is twelve.* This has been GOD's law, since the day He created the heavens and the earth. Four of them are sacred. This is the perfect religion; you shall not wrong your souls (by fighting) during the Sacred Months. However, you may declare all-out WAR against the idol worshipers (even during the Sacred Months), when they declare all-out WAR against you, and know that GOD is on the side of the righteous.
everything is subject to interpretation but thats why its reiterated, many people choose one verse, in the constitution too as you may agree and spin it to mean something else. a very physicist way of thinking, relative spin produces a relative existence.