To live without faith, without a patrimony to defend, without a steady struggle for truth – that is not living, but existing.
For many people today, practical atheism is the normal rule of life...If this attitude becomes a general existential position, then freedom no longer has any standards, then everyting is possible and permissible.
“What is perfection in love? Love your enemies in such a way that you would desire to make them your brothers … For so did He love, Who hanging on the Cross, said ‘Father, forgive them, for they know not what they do.’” (Luke 23:34)
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.
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.
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