Excuse me . . . Catholic missionaries are widely known for many things, but actually proselytizing people isn't one of them. Mother Teresa herself was a well-known syncretist who didn't think actually converting people to Catholicism was that important.
Here in the United States, meanwhile, Fundamentalist Protestants serve as a universal punching bag for all other religions who are committed to a non-proselytary (and therefore relativistic) worldview.
She is a lot more than you realize and casting her as a syncretist is just one more calumny to throw at a saint.
I can tell you I live in a heavily Baptist area with few Catholics other than a few thousand. I don't give them a thought other than to pray for them.
I can't think as to the last time ANY religion other than my own was addressed by anyone in the church.
Are you sure you aren't projecting your own thoughts and beliefs on others? It sure sounds like it.
It could also be said that we serve as punching bags for those who have been alienated by the protestant zeal for the personal witness.
As St. Francis said, "Go out and preach the Gospel. Speak if you must."
Rarely are people converted or evangelized by words. It is the actions that turns ones soul.
With all the Words our Lord spoke, it was His Actions, including the Resurrection that converted souls.