I believe people who are working professionals and have busy lives are particularly susceptible since they often graze news and prefer things that confirm and entrench their worldview because it's ego affirming.

They have the critical thinking skills but lack the desire to use them in some circumstances.

There are other people who lack education who also lack critical thinking motivation and all variations of this matrix. I'm just saying it's a huge mistake to assume intelligent, educated people are somehow immune from propaganda.