The vandal who allegedly scrawled anti-Semitic graffiti on a scrolling message board outside an Upper East Side synagogue last week has been arrested and charged with a hate crime, police said.

Lenny De La Rosa, 21, was busted Wednesday in connection to the 7 p.m. Saturday vandalism targeting Congregation Kehilath Jeshurun Synagogue on East 85th Street, near Lexington Avenue, cops said. 

He was charged with criminal mischief as a hate crime and making graffiti, according to the NYPD.

Cops say De La Rosa took out a marker and graffitied a display screen attached to the house of worship.

He ran off on East 85th Street after the hateful act.

By the next morning, the writing had been wiped off and the sign was not permanently damaged.

“It was pretty easy to wipe off – they got it clean in a few minutes,” a neighbor named Scott told The Post on Sunday.

“There’s three cameras right there!’ Scott, 51, continued. “Guy was probably wacked out on drugs. We get a lot of that here.”

The NYPD’s Hate Crimes Task Force investigated the crime.