You are only conflicted now because of years of them telling you that only they have "the truth" that only they do this or that. Get away from it for a few months and you would be surprised at how much clearer everything becomes. The reality is that most of their teachings do not stand up to scrutiny and they have lied about their history.
As to peace and love, I personally didn't see it, nor many others. I have since visited other churches and found them to be much more caring to fellow members. Do they visit sick people, take them meals? Do they go to the nursing homes to visit anyone? Other religions do this.
Unified? I guess, but that unity is based on a strict control over what people think, do and say, and based on seven man's thoughts and whims. How much of what they require is not actually found in the bible? Sure they can pull scriptures out to justify just about anything, but that doesn't make it right, they are cherry picking to justify their intent.
The preaching work? How effective is it really? Virtually no one in China and other parts of the earth have ever heard of the religion. Even in areas where there are more JWs, most people know nothing of the beliefs, only that they stand around by a literature cart and don't celebrate christmas, so how effective is it really? Most JWS know this, which is why most service is perfunctory, for the minimum amount they can get away with.
Keep asking questions, only an organization with something to hide is afriad of them.