The Monsey stabbing suspect is a severe germaphobe who washes his hands “50 times a day” and hears “demons” — and had been off his meds before the attack, his lawyer said Monday.

Grafton Thomas, 37, isn’t anti-Semitic, lawyer Michael Sussman said — around the same time details about the suspect’s writing journals surfaced showing he had filled several pages with anti-Semitic rants.

Thomas even “seemed a bit stunned” when he was told what he had done, Sussman said.

Thomas headed to a rabbi’s home in the Rockland County town during a Hanukkah celebration and stabbed five Hasidic Jewish men Saturday evening because he “seem[ed] to indicate that he was following directions that evening to destroy” and that a “piece of property was in the house that he needed to destroy,” the lawyer said.

Thomas “suffers from auditory hallucinations and demons” and had been prescribed at least three medications: the depression-and OCD-battling Prozac, anti-schizophrenic Seroquel and Latuda for bipolar symptoms, said Sussman at a press conference at his Goshen office, with the accused man’s mother with him.

The lawyer said authorities found “multiple containers” of bleach in the suspect’s home — but said they were there because he was obsessed with germs and hand-washing. Investigators have said he used bleach after the attack to try to clean off his clothes.

Thomas — who has been mentally ill for “10 to 12 years,” and recently moved back in with his mom after a series of hospitalizations — was not taking his medication “in the weeks leading up to the attack,” the Orange County lawyer said.

Thomas’s mother is in “total shock” over her son’s alleged crime, said Pastor Wendy Paige of the Harriman Methodist Church, who accompanied the mom to the presser.

Thomas’s mom, registered nurse Kim Thomas, was asked whether she had anything to say to her son’s alleged victims and mouthed, “I’m sorry,” before breaking down in tears.

Kim Thomas “did not notice the deterioration of [her son’s] mental state” in the past few months, the pastor said.

The mom said that when she would visit her son in the hospital, she would wonder, “Can’t they see that he needs more services?” Paige said.

Thomas, whose father is a Mormon from Utah, is a practicing Methodist, Paige said.