In these modern times people look to improve relations with other "churches" but that, ultimately, does not benefit anyone.  Remember, Jesus said he came to bring division and strife.  We know our Holy Mother Church, led by Our Holy Father and a select few men, is the One and Only True Church.  As long as we give others to believe that they have a chance to avoid the fiery pit by practicing other "religions" we encourage them to make the wrong choices.  Life is a pass/fail exam and those who don't get the right answer (Roman Catholic!) are in serious trouble.  It is an act of love and mercy to mercilessly criticize their beliefs and remind them of the impending condemnation, so that they will join the One Church, before its too late and they end up spending an eternity in severe torture, thorough God's mercy.