Fort Hood is still reeling from last week’s carnage, in which an Army psychiatrist is accused of a massacre that left 13 people dead. But in the town of Killeen and other surrounding communities, the attack, one of the worst mass shootings on a military base in the United States, is also seen by many as another blow in an area that has been beset by crime and violence since the wars in Afghanistan and Iraq began. Reports of domestic abuse have grown by 75 percent since 2001. At the same time, violent crime in Killeen has risen 22 percent while declining 7 percent in towns of similar size in other parts of the country. The stresses are seen in other ways, too. Since 2003, there have been 76 suicides by personnel assigned to Fort Hood, with 10 this year, according to military officials.