Religion, eh? It can present as a controversial subject, especially considering the role science plays in today's world.
Religion is a way to reach God. It disciplines us, connecting us with our true nature, thus God. Ultimately, since God is present in all, every religion worships the creator. Even Hindus who worship Shivji, Devi or Vishnu, Muslims who worship Allah and Christians who worship God. Rather astounding? Maybe. However, there is a simple truth to it. As Krishna said in the Bhagvat Gita, "whoever worships the demi gods worships me but in an improper way". Even so, through the worship of Shiva, Vishnu, Krishna, Ram, etc. our worship goes to Vaheguru but that way is improper as one does not connect with the formless Lord. The full realisation of one self or enlightenment is not accomplished. One is still bound to heavens however high they may be.
All religions are separate paths to the same truth, however followers get deluded by rituals, etc. The materialistic aspect of religion wins many over. Many think themselves noble as they commit many atrocities in the name of religion, I don't believe I have to expand on this.
Some claim their religion is superior and that of other's inferior. Some claim Jesus is the way, others say the same about Mohammed or Krishna. Some deny the existence of God and think the believers are deluded. Even this is illusion (maya/ ignorance), not anything else. In each religion, people are urged to worship the supreme being, the formless lord, however, many get caught up in debunking the beliefs of others. What can we preach others if we have not realised the mystery of the formless, whom every religion speaks of?
"Raam raam karta sabh jag firey, raam na paiya jaae", why? It is because we cannot overcome our pride and devote ourselves selflessly to Vaheguru/ Allah/ God/ Brahman/ etc. The thing is, in Sikhism the path is straight forward. Guru Nanak, the lord himself, took pity on us wretches and gave us the unadulterated truth. The shabad is the guide, naam the way. However, that does not mean God cannot be reached by following a different religion, he very well can.