Here's the facts:
1) If you accept the Bible as truth, it must be regarded as truth in it's entirety...you cannot pick and choose what you like as though it were some kind of religious buffet. If you think Jesus saves, you must also accept the back story (the OT) as the way god really is. To doubt any of it is to doubt it all (which is precisely why I doubt it all). That is logic.
2) On the other hand, if you look at the Bible as a fictional story with moral relevance, you must consider the morals of the main characters involved. Morals come from the inside...the human perspective. And from a human perspective, the God character is not a good role model. He encourages mindless violence, revenge, rape, murder of children, incest, etc. etc. So yes, if you use God as your model for perfection, then the Bible does indeed encourage violence. UNLESS you take to this Jesus character instead, who teaches peace (more or less) and who in essence seems opposed to God's violent/hateful ways. But since Jesus is the son of God, or is God (at least part of him)...you now have a contradiction...the good and bad are entertwined and your hero is at least partially evil.