They are "human rights" organisations because they seek to have governments held accountable for upholding their legally binding international treaties that compel governments to offer basics human rights to their citizens.
They are not representing any political ideology, but are independent and international, not seeking to be elected for any personal gain. The closest thing we have to elected officials with such a mandate is the UN.
Like all organisations relying on donations, political and non-political, they have a natural incentive to behave in such a way that will increase their donations. There are few organisations in the world independently wealthy enough to allow that kind of absolute freedom.