If you want me to stand up for what I believe in, pay my fare to his location and I'll solve the fuckin problem!!
And what problem would killing him solve? You can't undisclose what's been disclosed.
Do you actually know whom Snowden is or what he did? I don't think you do. My I recommended "The Snowden Files by Luke Harding" ISBN 978-1-78335-035-3
Sit down in a quiet room and educate yourself.