it's a very touchy subject, there are numerious schools of though regarding the issue.
imo the modern catholic church does not 'fundamentally discriminate' against other religions, in fact it has become more open, inclusive of other religeons.
"Those who, through no fault of their own, do not know the Gospel of christ or his Church, but who nevertheless seek God with a sincere heart, and, as they know it through the dictates of their conscience-those too may achieve eternal salvation."
http://www.scborromeo.org/ccc/para/847.htm