Bowman should run as an independent. There's no downside. Even if it makes a republican win the district (very unlikely), it's not much of a difference between Latimer and a republican.
It might also force AIPAC to throw more money into Latimer. The more you make them waste money, the better.
Jamaal Bowman already has an endorsement from the Working Families Party, although I can’t tell from my brief, superficial glance whether WFP actually had a primary in his district or has him on their ballot line for the district.