There are lots of movies that attack religious rituals because people don't end up "finding God", but it is important to remember the basic meaning behind these rituals. First of all, religious rituals should be done with true devotion, not ego. They shouldn't be done because people want to prove there is or isn't a God. Rituals that are done with arrogance or an egoistical purpose never bear fruit. Only when they are done with true devotion, wherein a person has no motive but to communicate with God, do they bear fruit.
Also, the fruit borne from rituals takes time. Yes, every ritual does bear fruit and God never forgets his devotees, but they bear the fruit as and when the time comes. There are so many examples in our puranas where a person does tapasya for years and years before God finally appears to them, or when a person does penance for decades before that penance bears fruit.
I feel that so many people today want immediate gratification. They have no patience to wait for destiny to take its course. People have forgotten the concepts of karma and dharma, and how they affect a person's life. Just because one does a ritual does not mean they will find God immediately and all their wishes will come true the next day. If finding God was that easy, then why would the great Maharishis of yore have struggled so much? Why would it take so much hard work and effort to attain moksha? Yes, God is everywhere and resides in every particle of Earth, but to attain him is not easy.
Before "finding God", we must cleanse ourselves of all our sins and make ourselves worthy of finding him. People do not understand this, and instead criticize the validity of religion and religious rituals. People have become very egoistical and think God should be at their beck and call, coming to them whenever do one religious ritual. First we should remove our ego and get rid of all our earthly desires. Only then does God answer to us. A person may ask, what's the point of religious rituals if God doesn't answer immediately? Well, the answer is that religious rituals prepare us for God by removing our ego and destroying our sins. The more rituals we do, the more worthy of God we become. It takes lots of time and devotion, and only when our ego is completely destroyed can we find God. We should never go to God with arrogance, because if we do, we will never find him.
So movies like PK that attack religious rituals will never find God, because ego is the ulterior motive behind their message. These movies are encouraging immediate gratification and telling people that if God doesn't come immediately when called, then there is no God and the rituals are useless.
It doesn't matter what religion one belongs to, what color they wear, what color is auspicious/inauspicious. A person doesn't have to believe in all religions. Believe in the religion that is close to your heart, and follow the rituals without any ego or arrogance. Don't think you know everything. Destroy your ego and you will find God. If not in this lifetime, then another lifetime.