The end point is not whether a person feels they're justified. People can feel justified for many things. I'm sure the Kent State person felt justified in their rampage; but that rampage infringed on the base rights of others; notably the right to life. The point is more concrete than that, is the person justified. Do you think they are justified. If someone steals the product of my labor, am I justified in seeking damages? If someone tries to take my life, am I justified to defend it; no matter what the law may say. Is it right? Because in a world of floppy rights, I am beholden to only that which society and law has granted me. There's no right to revolt for instance. If a government acts grievously against my rights, I have no rightful recourse as they would have set the rules to forbid it. I may feel I have rightful recourse, but it doesn't actually exist in a world of purely floppy rights. But my feelings are inconsequential. Does it exist or does it not exist.
I think the part you don't understand is that you will fight for what you perceive your rights to be because it is your desire.
You keep going on about people having to accept the hand they are dealt if these rights do not exist. I disagree. If they think it is right to change their life in some way, than they will probably perform some actions towards that goal and either be successful or not. However, their belief is all the justification needed.
You are perfectly justified in applying your natural rights, as you see them, because you believe in them and will act on them.
The end statement is, are all people fundamentally equal?
I like to think they are equal, but how would we measure it? I hope they are equal, I think its good to treat them as if they were. My religion tells me that I should treat everyone as I wanted to be treated. I don't always do a good job at it, but I try. I don't think the question is answerable though or else I could whip out a spreadsheet or a math program and perform a series of proofs on it.
As a practical and moral matter. Society seems to be more functional when we apply the concept of equality though.
Is human human, or are we product purely of environmental/societal constructs? We prosper because that was our random chance. People who suffer must accept their suffering because that's their lot. If there are no fundamental rights, then those who suffer must accept and live in it. They have no just reason to fight. If there are fundamental rights, then those who suffer have just reason to fight against that since their rights have been infringed upon.
We are a product of instinct, brain structure, the environment around us, the physical constraints of physics and chemistry. We prosper sometimes because of random chance, our choices, our birth circumstance, or any other number of reasons.
You mention accepting the hand you are dealt again. Again I state that you only accept that if you believe you must accept it or if you think it is best to accept it. YOUR BELIEFS MATTER, but they only matter for you. Just like mine only matter for me. In fact if we didn't have beliefs, society would have never progressed beyond people standing around next to each other, each person doing their own thing. Its the interaction between our actions, driven by our beliefs, that make society function. So its really the opposite of how you imagine it.
In the end, I fall fairly well within Immanuel Kant's philosophy that natural rights can be realized through thought. And I think there is great importance in stressing a base set of natural rights.
If that's what gets you out of bed in the morning, than great. I like to see people happy.
I think we have gone as far as we can with this. It looks like we are simply restating ourselves at this point and have been for the last three posts.