Enter by the narrow gate. For the gate is wide and the way is easy that leads to destruction, and those who enter by it are many. For the gate is narrow and the way is hard that leads to life, and those who find it are few.
The opinion of the crowd is powerful. We tend to think that whatever most people do is most likely to be the right thing, whatever the majority of people think is probably correct. If it's suggested that we might be wrong on something we take comfort in the fact that many others believe/do the same thing so we're probably ok. But what if the majority is wrong? What if the popular view that there can't just be one way to God is untrue? What if the common idea that trying to be a good person will keep God onside is a massive mistake?
The truth of a particular statement does not depend on the number of people who agree with it. Look for truth, but don't just go along with the crowd.