There is no ambiguity in Matthew 10. It is clearly stating that the violence will be directed against the disciples, not encouraging the disciples promote violence. It is absolutely crystal clear. Just read it for yourself.
The actual fundamentals of christianity are peaceful. It is a 100% peaceful religion. The fact that some people can lie about the writings of christianity doesn't change it into a violent religion. Since when has lying about a subject been acceptable grounds for recharacterizing the subject? Would you apply this same standard to anything else?
And as far as legislation goes, legislation is never peaceful. It is always violently enforced. It was a nation of protestants that wrote "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof" -- that is, preventing legislation. Modern day crusaders who try to enforce their own beliefs through legislation know nothing of christianity.