Like they secretly hold mostly right wing views, but they want to hang out with the cool progressives. One of my ex friends blamed Corbyn for everything, even Brexit??? Another now posts anti Muslim stuff on FB regularly. A third is now a full on ecofascist who will just rant about black people like he's my demented grandma.
In my limited experience, they were already there but they were coy with their opinions. Sorry to repeat myself, but chuds aren't very fun to hang out with compared to progressives.