Doesn't matter wether someone objects to someone elses lifestyle. No reason to be rude about it.
I don't agree with all of the life choices of an IRC Asatru friend of mine. He doesn't agree with all of mine. We still get along quite well.
The 'trick' is to not be so arrogant as to think that you can dictate to others. Or that you are 'above' common courtesy and friendship. Also, the words 'those people' or related shouldn't be part of your vocabulary, if you take my meaning.
And, my personal understanding, any Christian who forgets we're all sinners and starts thinking themselves better and others worse is, Biblically, in more dire straights than the fellow sinner that he or she looks down upon.
Hmm, bit of a rant there.