It was a dispute in the PLP Annie. Kinnock is no longer a member of the PLP.
Ed is still a member of the PLP so legitimate that he should express a view. I just googled Ed and Kinnock and Kinnock is he one who got all the publicity, thumping tubs and urging Corbyn to resign. Ed's language is far more moderate and diplomatic "reluctantly", "with regret" etc.
I know Ed is not a great front man - too much of an intellectual to be a successful leader - but I have a lot of time for him. He has behaved with a huge amount of discretion, tact, professionalism and dignity over the last year. Which is what we should expect of our politicians. John Major has also behaved to high standards since he relinquished the role of party leader.
Kinnock, who managed to lose 2 elections, is hardly in a position to take the moral high ground and say that Corbyn could not win a future election. Hence, unseemly.