Q: But gazwas were all in self defence.
A: They weren't. If Muhammad acted out of self defence, why did he take sex slaves? Does not he value human dignity? What would justify taking sex slaves but seeking gain and worldly pleasure?
Q: Was the Quran written in an Arabic tongue?
A: No it wasn't. Words like Enjeel isn't an Arabic word but taken from Greek. Tawr (طور) means a mountain taken from Aramaic. Ibraheem, Moosa, Elias, Gabriel are all Hebrew names which have meanings in Hebrew but in Arabic they are meaningless.
Is Islam a peaceful religion?
I was commanded to fight all people until they witness that there is no God but Allah and Muhammad is his prophet.
But the Quran commands tolerance.
These Meccan verses are all abrogated according to the interpretations of all major Islamic interpreters.