Watching from the US, I agree that it is unreasonably being called confusing.
However, you are leaving out the part where Labor has said they will end freedom of movement and the EU has said they will not agree to single market but no freedom of movement. So while the Labor position seems clear, it doesn't seem realistic and it is also unpopular with a large portion of the party (as would be any brexit position).
Antisemitism is also a major issue in Labor (not just Labor), although I get the strong sense that fewer UK voters care about that than one might hope. It still seems likely that some people who might otherwise be strong supporters of Corbyn do not enthusiasitically support him because of this.
Corby also seems to have a bit of an authoritarian streak, although it is hard for me to tell for sure since UK politics seem to be structurally more publicly heavy handed from the party leadership than US politics. It seems to affect how he responds to various issues and might make them have more negative effect than they might otherwise.
Another huge issue seems to be the raging battle between the human friendly side vs the business friendly side of Labor that should really be two different parties but can't because of the voting system (same issue in the US). I would agree that much of the vitrol against Corbyn seems to be due to him being on the human friendly side.
As a Brit watching from France, I have been a bit perplexed how the antisemitism issues have kept being brought up in the news. It reminds me a lot of Hilary's email server issues. Yes, there is a problem that needs addressing but it feels like some group is working hard to keep it in the news.
Corbyn and the people around him do seem to have a hardline feel to them. He seems unpragamatic and has had to fight against the more centralist elements of his own party, as well as being character assassinated relentlessly in the press. It's very unfortunate timing given how desirable it would have been to have a strong opposition during the last 3 years.
> the part where Labor has said they will end freedom of movement
Yes, and it is still in their manifesto, live today. That is completely incompatible with the SM. In fact, that is precisely the issue that led TM to the WA that is currently on offer. Barnier's slides, linked above, show exactly what tier of EU association is on offer without FoM. Hint: it is a very, very low tier.
So the idea that JC will eliminate FoM and achieve any agreement substantially different than what TM already got is utter pixie dust.
> Antisemitism
The antisemitism stuff is utter hogwash, as in these days it is 95% of the time. Labour says, maybe Israel possibly isn't treating Palestinians in the most ideal way, and maybe annexing large swathes of territory and building settlements could be less than the greatest possible good. Result: they're antisemitic, want the destruction of Israel, and are basically Nazis. Just like in the US. Heaven help anyone who supports BDS. At bare minimum they won't be allowed to visit the free and democratic country of Israel.
I agree about the deal; I think brexit would look different under Labor but that would mostly be in terms of UK law and less the agreement with the EU. In terms of the future relationship it seems like Labor would aim for customs union plus whatever they can get (as you say not much, although maybe something due to closer regulatory alignment in some areas). The withdrawal agreement seems unlikely to change.
I support BDS but I don't agree that is the main issue with Labor. The main issue I see is bullying personal comments that MPs make to each other and sometimes in public (similar to sexism, also a major issue) and the particularly bad way Corbyn has responded to it. In general, even when BDS is involved it is often the particular language used that is the issue (and many people who support BDS are also antisemitic). Some people argue that BDS is inherently antisemitic, but I don't see that being much of the issue with Labor (or in the US).
However, you are leaving out the part where Labor has said they will end freedom of movement and the EU has said they will not agree to single market but no freedom of movement. So while the Labor position seems clear, it doesn't seem realistic and it is also unpopular with a large portion of the party (as would be any brexit position).
Antisemitism is also a major issue in Labor (not just Labor), although I get the strong sense that fewer UK voters care about that than one might hope. It still seems likely that some people who might otherwise be strong supporters of Corbyn do not enthusiasitically support him because of this.
Corby also seems to have a bit of an authoritarian streak, although it is hard for me to tell for sure since UK politics seem to be structurally more publicly heavy handed from the party leadership than US politics. It seems to affect how he responds to various issues and might make them have more negative effect than they might otherwise.
Another huge issue seems to be the raging battle between the human friendly side vs the business friendly side of Labor that should really be two different parties but can't because of the voting system (same issue in the US). I would agree that much of the vitrol against Corbyn seems to be due to him being on the human friendly side.