No one has any right to force data on you and command you to believe it or else. If it is not true for you, it isn't true. Think your own way through things, accept what is true for you, discard the rest. There is nothing unhappier than one who tries to live in a chaos of lies. Do not tell harmful lies.
Harmful lies are the product of fear, malice and envy.
They can drive people to acts of desperation. They can ruin lives. They create a kind of trap into which the teller and the target can both fall. Interpersonal and social chaos can result. Many wars began because of harmful lies.