I think there's a lot in what you say, Gumpendorf.
I spotted a specific technique among the Trumpettes before the election of posting "Oh I think he's terrible, completely disagree with him, but [insert set message]".
Rinse, repeat. Once set message has been established as "truth", insert next message and repeat.
And I don't know for sure, but I'm wondering if I'm seeing that now with Jacob Rees-Mogg, who of course has been meeting with Bannon to see how Bannon can help him: www.independent.co.uk/news/uk/politics/jacob-rees-mogg-steve-bannon-meeting-politics-london-hotel-breitbart-tory-a8088001.html
I could be completely wrong of course, and some are bound to be ordinary, in-good-faith posters, but there have been an awful lot of posts saying "Obviously he's awful and I completely disagree with him, but at least Rees-Mogg is honest."
Don't know. I'm just starting to get a bit sniffy whenever there are large quantities of posts saying "Obviously I disagree BUT."