A deranged man allegedly set fire to a Pennsylvania home after a woman living there rejected his romantic advances — killing an accomplished Army vet and seriously wounding two others, according to authorities. Robert Zimmerman, 40, was arrested after allegedly starting a deadly inferno that tore through a home in Lewiston around 11:55 p.m. on Wednesday,  according to the Lewiston Police Department. Robert Zimmerman, 40, allegedly set fire to a Pennsylvania home after a woman rejected his romantic advances. Lewistown Police Dept. Multiple witnesses reported Zimmerman was at the home — which was rented out to several subletters — to profess his love for a woman living in the attic, police said. “It was reported that Zimmerman became upset when he was rejected by the female, and he began setting several items on fire on the first floor of the residence,” cops wrote in a statement.…