Blame is not a finite resource. Just because 2 people are involved doesn’t mean they’re both 50% to blame — they can both be 100% at fault.

So to answer your question, the person is responsible for their onerous views. They chose to watch that trash and believe it. We can have compassion for them without absolving them of blame. At the same time, they are a victim of the people lying to them. So it’s fine to blame the person consuming the bullshit and the person producing the bullshit, and the fact that there are 2 people to blame doesn’t make either of them any less to blame.