What you must realize is that conversion is by no means.... easy. Remember what Christ said about how those who are well are in no need of physicians, but those who are sick. But if you take in the totality of the Bible,
all people are "sick." Some people are harder to cure than others, because they don't believe they are sick, or know but don't care. It's kinda like an obese man that refuses to diet. Telling them a remedy isn't meant to hurt them, but they nevertheless take much offense to it.
Chritianity's greatest appeal is to the broken and the hungry. Augustine spoke of a void God filled that the Manicheans and earthly pleasure couldn't satisfy. My own pastor (Mike Macintosh) became a Christian after years and years of self-indulgence, drug abuse and outlandish UFO cults made him penniless and damaged his brain so much that he believed, for two years, that the left side of his head was missing. And Christ Himself gave the blind, lame, demon possessed, sinners and tax collectors healing and a chance to right their own past (remember Zaccheus?) As long as people believe they have it set, that all their ducks are in a row, or that things will stay good, like many hedonistic types like those friends you mentioned, they will never admit what the really are--naked, sick and hungry. This self-deception is deadlier than any virus of which I know. Some self-righteous antitheist or Marxist may claim that once social and economic barriers are crossed, a person need not use religion as a crutch anymore. Well, I think they're wrong. Every person must come face to face with the fact that they will die and their accomplishments will amount to nothing (read more on that in Job and Ecclesiastes). What Jesus gives that land, bread and freedom cannot give is first of all, a sense of dignity in that the Master of the Universe redeemed us and made us co-heirs, and second, life everlasting.
Also, you need to consider a fundamental difference in Hindu and Christian thought. Hindus believe that the highest goal is nothingness (to be one with Nirguna Brahman, the 'god' with no attributes) while Christians believe it is everlasting life (Heaven, duh). Hindus believe that everything is a part of God, while Christians believe that God is distinct from creation. CS Lewis had something to say about this pantheistic worldview--
Lewis wrote:Confronted with a cancer or a slum the Pantheist can say, 'If you could only see it from the divine point of view, you would realise that this is also God.' The Christian replies, 'Don't talk d*mned nonsense.'
Well, I don't think any Hindu would admit that, no matter how true it seems, anymore than a Christian would admit that God loved Hitler, Stalin and Mao. Nevertheless, I'd also encourage you to learn about other religions in their own contexts, and then set them up against Christianity. My Bible teacher (this was a Christian school) made us write articles on other religions, using non-Christian sites as a source.