The phrase "gullible people" refers to individuals who are easily tricked or deceived because they tend to believe things too easily without questioning or being skeptical. Full definition
Remember, the internet is full of gullible people who believe all sorts of ridiculous things basel on their feelings vs actual documented fact (like «climate change doesn't exist!» (greenkitchenstories.com)
It isn't really gullible people who fall for con jobs and ponzi schemes, it's people's greed that leads them to claims about getting rich quick and easy that gets them to put aside their better judgment and put caution to the wind. (religion.blogs.cnn.com)
Not because there is something wrong with religion, but because of how gullible people are when it comes to blindly following someone just because he says things like «I love jesus». (religion.blogs.cnn.com)