Community leaders on Friday denounced graffiti found this week in a boy’s bathroom at Darien High School that insulted women and threatened gay people. They also denounced an anti-Jewish comment made in an online Darien chat group. “The incidents this week have been reported to the Darien Police Department, and the [school district] administration has aggressively used all the tools legally available to conduct its investigation,” the leaders said in a letter sent to parents and staff in Darien Public Schools. “There is no place for sentiments of hate, bigotry, anti-Semitism or religious discrimination of any kind in our schools or community,” the letter said. “These behaviors are very disturbing and unacceptable.