Hey MM, I want to say that I do not disagree with your findings of many of the churches out there today.
Christians want peace as much as non-christians....but again, the focus must be God to find the unity.
Twice a year our church invites all the surrounding churches to worship with us. We gather outside and share the unity of love in our worship. It does not matter what the small differences are between different denominations or non's.
The small differences are actually a good thing if you think about it. If we were all one big church....someone (a human) would try and rule us and tell us what to think. It is good that we have different churches and ideas...but the same first love.