Am i evil to do what i must?

How can you say i am wrong?
Am i wrong to do what i must in order to survive?

Drinking human blood to survive.
You think me evil because if this?
At least i do it to survive.

Murders walking among the living?
I do my best to make sure they see the light.
They kill for fun. Am i not right?

How can you say i am wrong?
How can you say i'm Evil?
Why do you shy away from me?
Why do you embrace the real Evil?

Am i Wrong?
Are they right killing for fun?
Am i wrong to drink human blood to survive?
Do you think me insane?

Am i Wrong?
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I don't really know what to say about this one.... tell me what you think.