Concord police arrested a 23-year-old man Monday and charged him with threatening to kill indiscriminately people of the Jewish faith.

Police, along with the FBI, found out about Ross Anthony Farca’s plot through a tip from someone who saw him post threats on a popular gaming website.

According to the charging documents, Farca had a fascination with Hitler and a hatred for people of the Jewish faith. He’s been on the Concord police and FBI’s radar as a possible terrorist.

Neighbors said that they’ve been concerned with Farca’s behavior for many years and that they believe he had a propensity for violence and they’re glad he’s behind bars.

When officers searched the Concord home he lives in with his mother, they found an assault rifle with 13 magazines, a 3-foot sword, camouflage clothing, ammunition and books about Hitler Youth and Nazi life.

Authorities say Farca was planning a Poway Synagogue-type shooting but he preferred to wear a Nazi uniform. Police say in one of his posts he referred to the Christchurch mosque shooter as a hero.

Farca remains in the county jail in Martinez on a $125,000 bail.