By Matthias Williams and Michele Kambas PAROS, Greece (Reuters) - Alexis Kalaitzoglou makes a swift gesture to describe what he thinks about Prime Minister Alexis Tsipras: the shopkeeper on this busy tourist island pulls his leg back and swings it forward as if to give Greece's leader a good kicking. Kalaitzoglou is angry because his family's shop of jams, honeys and wooden handicrafts - part of a wider tourism industry that is the only bright spot for Greece's struggling economy - may be in for a rough ride. The tax hike is one of the sticking points thwarting a deal and prompting Tsipras to call a July 5 referendum on the bailout terms.