Peddlers who just want to get you to agree, regardless of the truth, we refer to as political, since power and control are their main concerns. To infer is to draw a conclusion from a set of facts. Can never be proven. Beliefs come to be seen as facts through folk wisdom, propaganda, myths, superstitions. We can never remove the lens through which we see the world, but we can become aware that the lens exists.
Objective tone is impartial, unbiased, unslanted.
Stereotypes may be true of some individuals, but they shut out new information that conflicts with old, embedded beliefs.