Neighbors say an Upland man arrested Friday on suspicions of terrorism, would speak with neighborhood kids about Islam and going to Afghanistan.
Miguel Alejandro Santana Vidriales, 21, and three others were arrested Friday in connection with a terrorist plot.
Manuel Gomez, who frequently visit family in the neighbor, said Vidriales lived with his parents and younger sister.
"They were a Mexican family and were hard core Catholics," he said. "You wouldn't expect that, not a Mexican family."
Gomez said Vidriales would "speak menace" to the kids in the neighborhood and talked about going to Afghanistan.
Maria Villa, neighbor and relative of Gomez, said her son talked with Vidriales, but did not like when he would discuss Islam.
"He would talk with the kids and talk about Allah," Villa said. "My son would just walk away."
Villa also said she would see Vidriales riding his bike in the neighborhood or sitting alone talking on the telephone.
Gomez said Vidriales' house was like a "party house" and he would stay up late.
He added that Vidriales' parents were out of town due to a death in the family.
No one answered the door at Vidriales' residence, but a sign that read "Don't burn the Quran" was seen in a window and was later removed.
Other neighbors had little interaction with Vidriales and his family.
Dorothy West, who lives next door to Vidriales and his family, said she didn't speak with the family at all, expect to occasionally borrow a key to the laundry room.
Kim Williams, another neighbor, said she didn't know the family but would see them outside barbecuing.
"The family seemed like they were the perfect family," Williams said. "You never know what people are going to do."