Fort Hood shooter Ivan Lopez was a slayer hater, according to a new report.

Before he killed three people and himself at the Army base in Texas, Lopez ranted on Facebook against fellow mass murderer Adam Lanza, whose Dec. 2012 school shooting in Connecticut left 20 kids dead, CNN reports.

The posts — under the alias “Ivan Slipknot,” a reference to a heavy metal band — include Lopez criticizing Lanza for pretending to be nuts.

Lanza “pretends to be a victim of mental illness followed by addiction to violent video games,” Lopez huffed.

Lanza sought “international attention” and “a minute of fame as a villain,” Lopez also griped, and won that fame “thanks to Hollywood and the sensational profiling by the media,” he complained.