lomed
you are mixing up some issues. you are right that both bain adam l’makom and bain adam l’chaveiro are both important. but both of them apply to jews. that being said, it is also important to be nice to gentiles. but that is a separate issue, not directly related to bain adam l’chaveiro which doesnt apply to them. (although you may be correct in that if someone neglects bain adam l’chaveiro he will probably not be too nice to non-jews either.)
also, another issue i must take with your comment is that certain people make untrue allegations that people who defend bain adam l’makom are somehow negligent with bain adam l’chaveiro. this untruth may have rubbed off on you, so i hope you havent bought into it. like the other day i started a thread pointing out problems with starbucks, which is a bain adam l’makom issue. does that mean i am somehow negligent in bain adam l’chaveiro? no. but there are people who will find a bad apple and incorrectly apply it community-wide.