I don't think the comparison with Corbyn is fair. Labour looks like it will win the next election by a landslide, and whatever Corbyn says will have little impact on that. Also, criticising Israeli aggression isn't as career-ending in the UK as it is in the US. So I think Corbyn has a lot more freedom to follow his conscience, whereas Bernie has to tread very carefully.
I don't think the comparison with Corbyn is fair. Labour looks like it will win the next election by a landslide, and whatever Corbyn says will have little impact on that. Also, criticising Israeli aggression isn't as career-ending in the UK as it is in the US. So I think Corbyn has a lot more freedom to follow his conscience, whereas Bernie has to tread very carefully.