A judge chillingly foresaw David Mazariegos’ escalating violence as he begrudgingly lowered his bail in an assault case — just months before the maniac allegedly beat a beloved security guard to death outside a Brooklyn subway station.

The premonition by Manhattan Judge Robert Rosenthal was revealed in a transcript from a July hearing, after prosecutors couldn’t secure a felony assault charge against Mazariegos, 25, in a case with eerie echoes to his later alleged fatal beating of Nicola Tanzi, 64, this week.

“The severity of these is increasing over time,” Rosenthal said during the hearing, referring to Mazariegos’ mile-long rap sheet, which mostly consisted of petty offenses until the assault in late June. 7

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Mazariegos’ charge in that case had been reduced to a misdemeanor

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