You mean a previously respected MP?.......
Sorry easy joke to make. Clearly Jeremy is a very good activist though. He's unbelievable at preaching to the converted he's spent his life giving great speeches at rallies and fighting the hard(er) left wing fight. It's precisely that which is why he has so much support amongst labour members and has also managed to retain that support despite everything.
Jeremy got to where he was by being an activist first and politician second. As far as I can see he didnt work his way up through big office government jobs, he got there through him lobbying left wing causes. Jermemy Corbyn was voted in as leader for his work and reputation gained as a left wing activist not a politician.
But what has Jeremy done since being in charge of labour which makes him stand out as a politican? He's mismanaged everything!? His shadow cabinet, his back benches, the media, the conservatives and the general public. He hasnt succeeded anywhere except in maintaining the support of people who already supported him by voting him in.
As you said he is the most left wing option labour has had since John Smith. People are voting (whilst blairites are rebelling against) for Jermemy Corbyn the ideology not Jeremy Corbyn. At least in my eyes anyway.