you could argue that by being quiet she was biding her time. it wouldn't be a tough argument to win.
what I don't get is this fawning of Corbyn as a man of principle. The guy is a hypocrite.
Whilst a backbencher Corbyn continuously revolted and ignored the party whip, voting according to his conscience. Yet as soon as he has a sniff of power Corbyn expected party members to tow the line or lose the whip.