He's saying

- Sci-Hub is doing good, but breaking the US law.

- The US law in this case is immoral, people don't like the law, and the law is bad for the country.

- The US government is unable notice that these laws are bad, and so will continue to doing bad things (like shutting down Sci-Hub).

In the sentence "Sci-Hub pits US law against morality", "pits" means to put things in a fight against each other (ostensibly, a fight inside of a pit). He's saying that the situation shows that the US law is not on the side of morality in this specific spot at least.

Native speaker. It is understandable (explained in sibling comments) but definitely puts eloquence before readability.

Non-native speaker I think. It was unambiguously supportive of the unarmed party in the conflict.