Is it permissible to accept money from relief organizations, presumed to be Jewish, for building commercial or agricultural projects, without a financial return?

It is permissible to accept free funds from relief organizations, even if their providers are Jews. The Prophet, peace and blessings be upon him, accepted gifts from non-Muslims. This is conditional on these funds not being in exchange for compromising one's religion or cooperating with them in their schemes. The recipient must also be cautious not to develop an inclination towards them in their heart. If one fears such an inclination due to the gift, then they should not accept it.