Long ago, the ACLU worked tirelessly to defend the civil liberties of Americans. Now they're just a fundraising organization that mostly exists to elect Democrats.
Snowden did a lot of good, but he also acted indiscriminately and betrayed American intelligence-gathering methods to foreign powers. He should be pardoned for whistleblowing on domestic surveillance but punished severely for espionage. Th ACLU knows this but would rather pretend otherwise, in order to get those sweet, sweet donor contacts.