The brother of the terrorist who launched the deadly car attack on Bourbon Street in New Orleans attributes his kin’s rampage to “radicalization.”

Abdur Jabbar, 24, of Beaumont, Texas, told The New York Times that his brother Shasmud-Din Jabbar — who killed at least 15 people in the New Year’s Day attack — converted to Islam at an early age.

The younger Jabbar told the newspaper that what his brother “did does not represent Islam. This is more some type of radicalization, not religion.”

Abdur described his brother, who was killed by police after mowing down innocent revelers, “a sweetheart really, a nice guy, a friend, really smart, caring,” according to the Times.

In videos posted to his Facebook page prior to the attack, Shasmud-Din Jabbar “pledged allegiance to ISIS,” the outlet reported, citing law enforcement officials.

The deceased suspect was driving while recording those videos, according to those sources.