Relying upon the constitution of 'The united States of America' as a reference for morality, while probably about as definitive a reference as those who are subject to it can get, is flawed, in that it is not widely accepted beyond those limits.
Freedom is flawed, maximum freedom exists at 50%, where all freedoms have an opposing limitation. The freedom to any belief is opposed by the limitation preventing restricting belief. The freedom to walk is opposed my the limitation that one cannot obstruct the walking of others. The freedom to murder is opposed by the limitation that murders cannot be opposed. Introducing subtlety complicates matters, but this is most likely true.
Lesser forms of freedom exist, where one community possesses freedoms over another. Such as with slaves, who, while the property of others, have value, and therefore are usually maintained, and there are far worse things in this world... And with the Nazis to the victims of the holocaust, who had no rights as enforced by legal and military power. And also those who have more money than others, who, while generally constrained by local laws, can still one will to be more limited than another. And of course there are humans and non-humans, however that is defined at the time, be it in the form of the treatment of animals, which even today is worse than anything done to humans. Or in inequality of races, or the complete disregard for the rights of plants, fungi, or anything else that humans cannot see familiarity in. And of course the utter disregard shared by almost all humans for the dignity of inanimate objects.
And 100% freedom is impossible, even at the cost of the freedoms of all others. No monarch can feed their people only because they choose to and no religious leader can ascend into the sky simple by the force of their will.
I would like your belief to be true, if I found a true belief then surely I could determine it's truth, or at least it's likeliness. To say simply that the truth cannot be determined is to deny any hope of being correct. There are far too many opposing beliefs for the truth simply to be stumbled upon with any confidence. I believe that belief is insufficient, many beliefs are retracted, it does not require reason or logic to be confident that, alone, faith will betray you. To have confidence in a belief requires ignorance or reason, many religious people believe that they have reasons, I would like to know these to assess them for myself...
Sorry for my tendency to lack focus...