ISTANBUL, July 5 (Xinhua) -- As Trkiye prepares to host the NATO summit on July 7-8, thousands of demonstrators took to the streets in Istanbul, Ankara and Izmir over the weekend to denounce the alliance's push for higher defense spending. Demonstrators carried banners reading "NATO wants war, workers want peace," "Budget for the people, not for NATO," and "No to NATO, no to war," while chanting slogans against t