I have seen the movie, and saw various comments on social media as well as news for both in support as well as against this movie. One group is claiming that the movie is showing Hindu religion in bad light, whereas another group that it shows true color of people taking advantage in the name of religion. I think both are completely wrong, and they have not understood the movie. I would encourage them to watch the movie again, and if they go after reading this post, it will help them understand the true story of PK.
God works in mysterious ways. God helps who trust God with the core of their heart. You can’t just perform some rituals and expect God to fulfill your wishes. You have to have faith in God. And your faith should not be selfish that if your wish is delayed, then you start questioning God. When you show true faith and devotion, God comes to you, show you the right path. Now all you have to do is walk on that path. This is exactly what PK story is all about. True faith and devotion towards God take the alien on his spiritual journey and God respond by showing him the right path.