Rabbi Daniel Roselaar and Rabbi Malcolm Herman, who know the Neustadt family, have urged the community to support the distraught mother.
Rabbi Herman, the associate national director of education programme Seed, said: “As a community we must do everything possible to support Ms Neustadt in her fight for justice.”
Rabbi Roselaar, of Alei Tzion in Hendon, described Ms Neustadt as “a woman of true integrity, and a loving and gentle mother who has been cruelly separated from her children”.
He said it was essential for the boys well-being “that they be reunited with their mother as a matter of urgency”.