Oh, I know loads of 'em. Basically my mum's generation who were in their teens/20s during the 60s. A number of them had socialist leanings but were put off by the hedonism/drugs scene in Europe/US at that time, and felt a strong affinity with Israel so went to live on a (comparatively genteel and wholesome) Kibbutz, which further pushed them into the ideological clutches of communism.