Robert Dorgan, who identified as Roberta Esposito, had shared thousands of unhinged posts on his X account before he went “berserk” at the Pawtucket ice rink Monday, killing two family members and injuring three other people before turning the gun on himself.

The 56-year-old killer routinely made worrying remarks railing against anti-trans hate and voicing his pro-Nazi views as he responded to, or reposted, other people’s crazed content.

The day before the ice rink bloodshed, Dorgan posted an Asian slur as he replied to a video praising Adolf Hitler, saying: “Really nice but a ch–k made that song.”

In other replies, he repeatedly referenced “white power” and “white pride world wide.”

He also retweeted footage of people doing the “Sieg Heil” Nazi salute.

Dorgan made an ominous post on X the night before the shooting as he raged at a fellow user who called trans Democratic Rep. Sarah McBride a man.

“Keep bashing us. But do not wonder why we Go BERSERK,” Dorgan wrote in the chilling post.

WPWW

The manic posts surfaced after Dorgan, who underwent gender reassignment surgery in 2020, gunned his down relatives sitting in the stands of the ice rink on Monday afternoon.

Officials said the gunman fatally shot one of his own sons and the boy’s mom.

Police haven’t yet released their names.

WP!

Investigators are still probing a motive but the shooting unfolded after years of heated court disputes over his trans identity.

WP!

His ex-wife, Rhonda Dorgan, filed for divorce in 2020 on the grounds of “gender reassignment surgery, narcissistic + personality disorder traits,” according to the court filing obtained by WPRI.

Their split was finalized in 2021.

The three people who were injured in the shooting included two other relatives and a family friend. They remained in a critical condition, cops said.

A woman spotted leaving the Pawtucket police station in the wake of the shooting identified herself as the gunman’s daughter, telling reporters he “has mental health issues” and was “very sick.”

“He shot my family and he’s dead now,” she said.