It's not trying to glue the legacy to Corbyn. It's noting that Corbyn refuses to unequivocally condemn Venezuela and clearly has sympathy even now.

All Corbyn has to do is make a statement like "Yes, I supported Chavez but unfortunately his regime wrecked the Venezuelan Economy and his successor has become a dictator".

End of story. He doesn't and he won't. It is apologising for them when you say 'there is blame on both sides'.

The original poster said that people on left having a lot of sympathy for Venezuela and continuing to support the current regime was rare and not seeing it as a cautionary tale. It's not. A few minutes of searching find various examples around the world. There are considerably more.

Here is another bit of support for them getting upset with Corbyn for not providing more support for Maduro.

http://www.socialist.net/corbyn-ignore-the-hypocrites-and-sa...