“If you believe what you like in the Gospels, and reject what you don’t like, it is not the Gospel you believe, but yourself.”
No one is forced to be a Christian. But no one should be forced to live according to the "new religion" as though it alone were definitive and obligatory for all mankind.
Those who with God's help have welcomed Christ's call and freely responded to it are urged on by love of Christ to proclaim the Good News everywhere in the world.
Evil too, will always be part of the mystery of the Church. And when we see what men, what the clergy have done in the Church, then that is nothing short of proof that he [Christ] founded and upholds the Church. If she were dependent on men, she would long since have perished.
Certainly, it is difficult to make the demands of the Gospel understandable to secularized people. But this pastoral difficulty must not lead to compromises with the truth.
There is a good article on much of the church's leadership's very misguided approach towards other religions. In this one it targets Islam. I particularly enjoyed the comments below for their truth content and incisiveness:
Distinctions Matter
Distinctions Matter Forward
Missale Romanum
Pre-1951 Calendar