For someone who professes to be Catholic, is it interesting to find you vigorously defending a man who we as Catholics would view as a false prophet, and false prophets we have been told by Jesus deceive many.
However, the notion that Mohammed always fought defensive battles is not true, as history itself reveals, as well as the Quran works on the Doctrine of Abrogation, which Dan999 explains very clearly.
Since its inception Islam expanded by conquering armies, it spread as far as Spain, India and Persia. These people were not at war with Muslims, yet Muslims invaded these lands to violently subjugate the inhabitants, take their property, women and children as war booty, and bring them to the Islamic faith, this is the point of Islam, fighting non-Muslims and conquering the world in the name of Allah is always the goal.
fordham.edu/halsall/source/conqspain.asp
americanthinker.com/2014/02/the_muslim_conquest_of_india.html
historyworld.net/wrldhis/PlainTextHistories.asp?ParagraphID=ebe
Islamic sources provide more evidence.
Quran 9.29
Fight those who believe not in Allah or the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the Jizya with willing submission, and feel themselves subdued.
Notice it says fight those who do not believe in Allah,it does not say fight those who fight you.
Tabari 9: 82
The Messenger sent Khalid with an army of 400 to Harith [a South Arabian tribe] and ordered him to invite them to Islam for three days before he fought them. If they were to respond and submit, he was to teach them the Book of Allah, the Sunnah of His Prophet, and the requirements of Islam. If they should decline, then he was to fight them.”
Sahih Muslim 33—The Messenger of Allah said: I have been commanded to fight against people till they testify that there is no god but Allah, that Muhammad is the messenger of Allah, and they establish prayer, and pay Zakat and if they do it, their blood and property are guaranteed protection on my behalf except when justified by law, and their affairs rest with Allah.
Sahih Muslim: Book 019, Number 4294:
It has been reported from Sulaiman b. Buraid through his father that when the Messenger of Allah (may peace be upon him) appointed anyone as leader of an army or detachment he would especially exhort him to fear Allah and to be good to the Muslims who were with him. He would say: Fight in the name of Allah and in the way of Allah. Fight against those who disbelieve in Allah. Make a holy war, do not embezzle the spoils; do not break your pledge; and do not mutilate (the dead) bodies; do not kill the children. When you meet your enemies who are polytheists, invite them to three courses of action. If they respond to any one of these, you also accept it and withold yourself from doing them any harm. Invite them to (accept) Islam; if they respond to you, accept it from them and desist from fighting against them. Then invite them to migrate from their lands to the land of Muhairs and inform them that, if they do so, they shall have all the privileges and obligations of the Muhajirs. If they refuse to migrate, tell them that they will have the status of Bedouin Muslims and will be subjected to the Commands of Allah like other Muslims, but they will not get any share from the spoils of war or Fai’ except when they actually fight with the Muslims (against the disbelievers). If they refuse to accept Islam, demand from them the Jizya. If they agree to pay, accept it from them and hold off your hands. If they refuse to pay the tax, seek Allah’s help and fight them.
It appears that you have been led to believe the sanitised version of Islam, which unfortunately is prevalent amongst many Muslims, and not the true version which past and present history, as well as Islamic sources reveal.