Re the Northwest Passage: Roald Amundsen sailed the Northwest Passage in 1903 and saw no ice. Therefore the ice would have been the same area as today's, or less.

The current melting is due to a slight change in warm ocean currents, not climate change.

Why does no one pay attention to the Antarctic, where ice is at a 30-year maximum? Oh, of course, because it doesn't fit with the global-warming zeitgeist, does it?