A Nassau County man has turned his popular Bethpage eatery into a patriot’s paradise and welcoming haven for first responders, proudly etching “Home of the Brave” on its exterior and filling just about every open space with troves of USA, police, fire, EMS and rescue decor. “I love America. We should all be grateful that we live here,” Embassy Diner owner Gus Tsiorvas, 44, told The Post. “And the customer reaction? Ninety-nine percent say they love it.”