Whether its we are god's chosen through Christ as Christian or as Jewish or as Muslim or any other group implys that if you are not part of that group you are the opposite god's rejected, outcast, dammed to hell or such.
The use of this type of doctrine is to have members attracted to your group as well as to put those who are not part of your group in a lower spiritual position.
I see this as programing supremist beliefs in a very sneaky subtle way. Sure most come for the social atomshpere or the networking and not for the radical beliefs. No mater what they come for they leave as part of a supremist group if they take away the belief that we are better and they are not as good because they are not part of our group. Even to the extent of exclusion by some groups.