There's a difference, which is that here Corbyn actually became the Labour party leader. However despite that he's still portrayed as an outsider by the establishment and the media.
- Corbyn is the leader of the Labour Party. Neither Hillary nor Bernie have that position in the Democratic party, because it doesn't exist. A party's presidential candidate is not the same as their party leader. And the method by which each is elected is radically different.
- Corbyn was already leader when these events happened. This is the equivalent of Bernie winning the primary (which as mentioned above is already a poor analogy) and then being lied to about what the DNC was doing in outreach for the presidential election. So, not something that mirrors reality at all.
- Bernie Sanders was not a member of the Democratic party before seeking to become it's presidential candidate. Corbyn has been a member of the Labour party for decades.
- Corbyn represents the resurgence of a relatively old wing of the Labour party, not the beginning of a new movement like Sanders.
Basically every part of this dynamic is different. They're both very interesting to study in their own right, and trying to conflate the two to make a political point does nothing justice.
That’s the comparison being drawn here. Does that make sense?
(Yes, the details are different as the mechanics of these party systems are very different.)
Staff within the Labour Party running ads to deceive their party leader into believing they were running a more progressive message than they actually were is literally nothing like anything that happened to Bernie Sanders in 2016.
In the American case, private emails in the dnc were talking about preferences of officials. Don’t forget that Bernie Sanders isn’t even a Democrat! So the officials had a preference for a Democrat to win, whatever.
No one has pointed to actual harm caused. Ultimately Bernie lost in the primaries even before the super delegates kicked in. Probably didn’t help he didn’t campaign in the south which is a requirement for winning.
Bernie lost fair and square and no one has alleged specific wrong doing. Just vague “but emails” - this is worse than circumstantial evidence.
So yeah I’d say a far reaching ad campaign to deceive is not at all the same.
It's extraordinary that two years after the fact so many people still do not understand what happened even though the facts are widely known and documented. This is the power of propaganda but still it's always a bit disturbing to see.