Here's why:
* He's definitely not a traditional villain: He doesn't actively seek to harm Alice or anyone else. He's more eccentric and chaotic.
* He's driven by fear and grief: The Hatter is deeply affected by the Red Queen's tyranny and the loss of his family. His madness can be seen as a coping mechanism.
* He aids Alice: The Hatter helps Alice on her quest to defeat the Red Queen, even risking his own life.
* He's more a product of his environment: The Hatter's madness is partly a result of living in a world ruled by the Red Queen's cruelty.
Ultimately, whether you see the Mad Hatter as "evil" depends on your interpretation. Some may see him as a tragic figure, while others might find his actions unpredictable and potentially harmful. The film leaves room for individual interpretation.
To get a clearer picture, you'd need to consider:
* The specifics of his actions: Does he intentionally hurt anyone?
* His intentions: Is he driven by malice or something else?
* The context of his world: How much is his behavior shaped by the oppressive environment?
It's important to remember that the Mad Hatter, like many characters in Wonderland, is a complex and multifaceted individual. He's not simply "good" or "evil," but rather a reflection of the chaotic and unsettling nature of the world he inhabits.