The issue of Christianity comes up from time to time.  The basic approach I have towards this is based on Rav Avraham Abulafia--a mystic from the Middle Ages who said about Jesus some pretty positive things. Not that that makes the basic approaches of Christainity right,. but it does show a different side to the whole issue.

In other words--the problems are well known--Paul certainly opened the gates to an very anti Torah approach which was not the approach of Jesus at all. But on the other the general attitude that I have encountered is that one has to say and believe that Jesus was a bad guy, and that is the one and only thing that makes one kosher--that also seems wrong. It does not seem to reflect on a commitment to truth but rather to ideology.