Jeremy Corbyn’s Warped Worldview

This article from Bloomerg https://www.bloomberg.com/view/articles/2018-08-27/jeremy-corbyn-s-warped-worldview is interesting, it doesn't limit its remarks to Jeremy Corbyn's problems with Israel and Jews.

'At the same time, to focus on Corbyn's anti-Semitism is to miss the wider context of his worldview. He embraces not only the rogues, fanatics and terrorists that despise Israel. He likes the ones that despise America and the U.K., too.

Call it geopolitical masochism. Corbyn may present himself as anti-war, but he's really just on the other side.'

I still wonder just why Jeremy Corbyn holidayed in the then East Germany at the height of the Cold War. What attracted Jeremy Corbyn to holiday there and why did he go?