Five councillors are among the members of the Tottenham Labour Group that voted to support a union representative recently suspended by Haringey Council.
Julie Davies, who has been an elected National Union of Teachers official for more than a decade, was suspended for “gross misconduct”.
The NUT claims the suspension is "unlawful" and an "attack on the unions".
The Tottenham Labour Group's general committee last week passed a motion agreeing to “the core Labour values of trade unionism” and “the right of workers to democratically choose their own representatives".
Labour councillors voting in favour of the motion were Gideon Bull, Emine Ibrahim, Stuart McNamara, John Bevan and Reg Rice.
A second motion, relating to comments made by Haringey school governor Gerard Kelly, condemned the comparison of Ms Davies to Hermann Goering.
It read: “This borough has a proud tradition of honouring the memory of victims of the Holocaust and honouring survivors.
“This GC [general committee] therefore rejects any comparison with the experience of people living in our diverse and harmonious borough.
“We reject that a trade unionist of Jewish descent has anything in common with those who committed such horrendous crimes against humanity.”
Both motions were moved by both Islington and Haringey branches of UNISON, the public sector workers’ union.
They were both passed unanimously.
Neither Tottenham MP David Lammy nor council leader Claire Kober, also members of the group, were able to attend the meeting.
Mr Lammy declined to comment on the suspension of Ms Davies.