I favor fundamental human rights and I also believe any state or non-state entity should do its best to adhere to the Laws of War.
Having said that, I do believe any people or groups who deliberately target civilians, regardless of the cause they use to rationalize it, should be held fully accountable for their crimes against humanity. Granting them immunity from responsibility can only create a de facto standard by which others are freed from their obligation to avoid causing deliberate harm to civilians, refrain from a wide range of war crimes/crimes against humanity, etc. In the long-run, that development would create a more dangerous and deadly world.
Finally, you can correct me if I'm mistaken in my assumption, but it appears we do not really disagree on human rights and the protection of civilians.