>Some Christians sure don't seem to consider (or care?) how their behavior alienates those who might otherwise be more open to the message.
Christian behavior would no longer alienate many people when Christians give up most foundational doctrines of Christianity and believe like the liberal, postmodern theologians.
And a foundational doctrine of Christianity is to show the Fruits of the Spirit.
One can and should live and witness the Christian faith without showing arrogance, pride, sarcasm, rushes to judgement, and the other obnoxious behaviors so rampant even between Christians. (see the religion forum)
We all slip, but when it's pointed out... the response is telling.
Anyway...
Here's an interesting thread on the topic.