a block buster new report shows that russia and china are using social media to, once again, divide the u.s. this time over afghanistan. john avalon has a reality check. >> america's foreign adversaries like to amplify our divides. they do it via social media, pushing pollerization because they know it makes us weak. it's a game of divide and conquer. and many americans are unwitting accomplices. a few months ago we learned qanon conspiracy theories were being pumped up by russia and china. they've done the same thing with anti-vaxx conspiracies during covid. airing first here on cnn "new day," shows how russian/chinese