That seems to have more to do with his refusal to face the music on rape charges than his releases.
> while hearing via media politicians (mostly Democrats) calling for his death
For most of the time since WikiLeaks involvement in the publishing the Manning docs, the calls for his punishment, including by the most drastic means, have been bipartisan but stronger on the Republican side. The Republicans changed their tune after Assange participated in the release of the DNC hack recently, but its somewhat revisionist to pretend that history started just a few weeks ago.