As Rachel Sylvester pointed out earlier this week, Corbyn's call for a UN political solution to Syria is pure wind. As he must surely know, Russia will use its veto in the Security Council, as it has so often in the past.
Dan Kaszeta makes the point in more detail:
Many critics of last weekend's military intervention in Syria, including Jeremy Corbyn, demanded that Britain instead try to find a political solution at the UN. But there's a problem there. The UN has been kneecapped on the issue. Vladimir Putin has made it effectively useless.
The ability of permanent members of the Security Council to veto actions has paralysed the institution. Given this landscape, calls to use the UN processes are either hopelessly optimistic or a ploy to delay and obfuscate.
This is not a recent development. Russia’s behaviour on the Security Council in recent years deserves careful scrutiny. Look at the history of its vetoes, which are a matter of public record - the draft resolutions and meeting minutes are available online....
There are now enough vetoes so that we can see a clear pattern of behaviour. Actions speak louder than words, and Russia's actions on the Security Council speak very loudly indeed. Based on these vetoes, it is clearly not interested in stopping the conflict in Syria.
What it is clearly interested in is blocking actions which would determine facts about use of chemical weapons and attribute blame for these acts. This is a brazen attack on well-accepted international norms.
Don't expect any complaints from Jeremy Corbyn, though.