with jesus

I am extremely confused regarding the methods of Islamic spread at its beginning, as every Muslim I know tells me that Islam spread through peace, wisdom and love yet all the history books I have read both western and eastern say other wise so.
-You people say that Muhammad didn’t like the spilling of blood then why do I read in history books that he led 27 battles in which 9 of them he fought him self or so say some of the Arabic history books I have read? Is it possible to fight in 9 battles and not kill one man and hate violence?
-I don’t understand how you people say that Islam is such a peaceful religion and your prophet who is every Muslim's idol fought 27 battles in less then 12 years. Please explain this to me I find my self in a dark room surrounded by voices that I can't understand!
-Did he or did he not order the complete annihilation of an entire Jewish tribe in Medina that had a population of 700 men who were slaughtered like sheep in one day?
- Did he or did he not send over 60 raids after appointing one of his followers to raid and pillage from other none Muslim tribes?
-Why did Muhammad fight only the Christian orthodox Roman Byzantines and not fight against the heretic Persians who were Zoroastrians?

That’s all I have to ask regarding Mohammad now I would like to ask about those who came after him the 4 caliphates (some books say that there were 5 caliphates others say 4 as I am not certain about this I hope you excuse my deficit in historical knowledge) :

-Wasn’t it the caliphates top priority to recruit armies and send them to rage wars on Persia and the Byzantines?
-isn't General Khalid ibn al-Walid considered one of the brightest Islamic idols? Considering that he engaged over 50 battles and never lost making him one of the most ruthless killers of all time.
-didn’t the Muslims fight in numerous battles after Mohammed's death such as the yarmouk and al-Qādisiyyah epic battles resulting in over 200 thousand casualties of troops only not to mansion countless enslavements? In which they conquered all the lands from Morocco west to Pakistan east and Georgia north to Sudan south?

-Why do you Muslims consider what the holy crusaders did to the Muslims in Jerusalem when they first entered city at 1099 A.D an evil massacre, When the Muslims had killed far more Christians in their self raised battles?
-how many Hindus did Muslims kill in India?
Another frontier I would like to discuses;
Why do you Muslims claim that you are the origin of all modern science, when the short Islamic scientific revolution had begun after translation of Greek, roman and ancient Asian scrolls into Arabic for your brightest to study and develop? It was pretty much you feeding on the knowledge of the nations you had conquered and built over it which was mostly Greek philosophy and roman science.

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We were enclosed,
O eternal Father,
within the garden of your breast.
You drew us out of your holy mind
like a flower
petaled with our soul's three powers,
and into each power
you put the whole plant,
so that they might bear fruit in your garden,
might come back to you
with the fruit you gave them.
And you would come back to the soul,
to fill her with your blessedness.
There the soul dwells --
like the fish in the sea
and the sea in the fish.