I think getting killed for your belief is exactly what Jesus was arguing for. It was also what all apostles did and the only cause for the next 300 years to be declared a saint.
Jesus' death was special, because he was without sins, he was the son of God (YMMV) and, because was walking around afterwards physically (i.e. capable of touching and eating, etc.) on earth. I am not sure, why you name it suicide, because he didn't killed himself, he got himself killed.
I do not think, that Jesus would defend "the agressor". But fighting in return is also not good, which is where "turning the other cheek" comes into play.
