Comment Re:seems like snowden did the exact same thing. (Score 5, Informative) 95
Here are a few more differences and corrections:
* Mitrokhin turned the data over to British officials only after the collapse of the Soviet Union. He did not endanger his country's ongoing intelligence operations. He may have embarrassed several former Soviet officials, but the revelations were not a crime against his country, as that country no longer existed at the time of their release. While the act of copying the classified data would certainly have been a crime against the Soviet Union, again, that country was gone. (Snowden released the data of his own still-active country, including information about active operations.)
* The data he turned over was archival material spanning decades and ending in the 1980s; he gave it up in the early 1990s. Some of it was less than ten years old at the time it was delivered. (Snowden's data was indeed more current and relevant.)
* After the publication of his notes in two books, the SVR actually provided academic access to the old KGB archives for a time. I think that was ended after the wrong person was embarrassed by his historical record, perhaps a former lieutenant colonel in the KGB. (The NSA has not yet opened their doors to the public in response to Snowden's release.)
* He was not a "whistleblower" in that he did not release this data in an attempt to change any ongoing practices. He was a historian who respected the truth, and did not want the facts distorted or destroyed by a regime with a long history of rewriting history. (Snowden is an activist, who is trying to effect change.)
* Mitrokhin's position was a Senior Archivist. He had access to essentially all KGB historical records, not simply operations of which he was a part. (Snowden was an administrator of systems, and had access to the records they contained; he also used other people's credentials to gain additional access to other records.)