This was unpopular because innocent people died. This was later regarded to as an accident but either way it was a terrible thing.
These people were know as federalists. They believed that the government should be run by the wealthy, and supported pro-British foreign policy.
The correct answer should be political speech. Although free speech exists and is established under the first amendment, the court came to the verdict that advocating the unlawful removal of a government in violent means in still prohibited because it calls for violence and something that is not legitimate, and is therefore banned.
