I don’t see anything wrong with Christians trying to convert other people. There is, of course, Christ’s command to preach the Gospel to the ends of the earth. But I think there is more we can say:
If you think that someone has harmful ideas (physically and spiritually), doesn’t it make sense to try to change their mind? In fact, wouldn’t this be considered an act of love?
Sure, everyone has a right to their own beliefs, and we should always show love, respect and hospitality to all people, regardless of their faith (or lack thereof). After all, shouldn’t Christians want a tolerant and just society for our Jewish, Muslim and atheist neighbors?
And we should never manipulate someone else into changing their beliefs. Hyper-emotional appeals at revivals come to mind here. True love never manipulates, and Truth has its own ability to convict and persuade. But does this mean we can’t conclude that someone’s beliefs are false and try to persuade them of the Truth?
Such talk of truth will make many in a postmodern world uncomfortable. But Christians follow Jesus not because of a belief in universal human goodness or the commonality of our faiths. We love God — thus we love our neighbors — because He first loved us (1 John 4:19).