Here is a great article from Christianity Today about inter-faith dialogue: One Way, Many Views - Christianity Today Magazine.
I have said it before and I will say it again. One of the biggest ways Christians can demonstrate "love your neighbor" is in their relationships with people of other faiths and other sexual orientations.
This is not easy. And, we should certainly forget that "love the sinner hate the sit" stuff. I mean, really, have we ever been able to love the sinner and hate the sin. How about we just love the sinner. We are human; we get the two confused.
I like this article because it demonstrates the troublesome nature of coming to terms with this issue. I found myself somewhere between the first pastor and the second. I believe we demonstrate our love for our neighbors by listening to them and dialogueing with them. We learn from then when we learn about their beliefs and value them as people. I like what was said about the exclusiveness of the relationship with God cause him to be inclusive of others.
But I am also evangelistic. I believe that Jesus is the way. I believe that people are held accountable for what they do with the message and person of Jesus Christ.
In saying that, I don't know if a person who obeys Jesus' commands but doesn't accept Jesus the person (or the Christian faith for that matter) is any worse off than someone who accepts the person of Jesus (or, again, the Christian faith) but does not obey the commands.