John Brown was a Martyr, Right?

I think John Brown is a martyr more than a murderer. He is a martyr because he tried to free enslaved people and arm them. He also wanted them to fight a slave rebellion. He actually freed some enslaved people. He also tried to steal the Harpers Ferry Armory in West Virginia. He went to with his sons to fight. Sadly his sons died in the battle. He was stabbed and taken to jail. Where he was later hanged. He was a terrorist in the south but I think he was a martyr in the north.