There's been a fair bit of debate in the US in the past couple of days about the parallels between the holding camps for immigrants in the present and the concentration camps of the nazis. The easy response is, of course, to dismiss such concerns as exaggerated, 'you call everyone nazis' etc. Yesterday George Takei tweeted: I know what concentration camps are. I was inside two of them, in America. And yes, we are operating such camps again. This thread is excellent. From someone who worked at the Holocaust memorial museum in the US, it talks about how the Holocaust came about and warns about ignoring the warning signs. https://twitter.com/cmclymer/status/1141101726390464518 I expect the usual deniers to dismiss this thread. The thread explains how deniers facilitated the Holocaust.