I think the moment that clicked for me was when I heard young people in my family circle (25 and below), _in_Europe_ claiming that Trump "will likely be good for the economy".
When I dug deeper they were effectively repeating talking points they heard on TT. When I dug deeper I also realized they are conditioned to distrusted mainstream news, but somehow 10sec videos on TT are legit.
If you can shape the opinions of young men in Europe, raised in social-democratic nations to have them believe that a bankrupt, convict, conman, traitor, kompromat, will be good for the US and global economy then you can truly shape any opinion anywhere.