(wrote this before beachbum's reply) the Annoying Orange card here is the protestant reformation, which was by all means a political movement to separate from the oppressive catholic church, however if the argument for islam is "it's in the book, therefore people believe it," then the same standard has to apply to christianity, or any other religion.
take note that judaism has all the awful stuff in the old testament without the protestant reformation (also, christians definitely still teach from supposedly obsolete and backwards old testament content depending on your denomination, speaking from experience as someone who grew up in a southern baptist household). does that mean the jewish are inherently violent? absolutely not, because at the end of the day they're just words on a page. religious individuals decide which parts of their text are most important to them, and if you've ever been to church on any sort of regular basis, you'll know that they only emphasize the parts they want to talk about. and this varies from denomination to denomination, church to church, pastor to pastor, and certainly, individual to individual.
