The Palestine Solidarity Campaign, which supports Hamas and whose logo shows a map of Israel and Palestine with one of those countries, erased is calling a trade union conference in London in another 9 days. Â Ironically, the only trade union general secretary who is listed as speaking is Bob Crow of the RMT — which was the leading union that spoke out against the TUCâs policy of boycotting the Histadrut at this yearâs conference.