Blair said himself (when refusing to join in the referendum debate) that he was 'toxic'. If he tries to help the 'Blairites) then they are sunk. Interesting.
Cassa,
Your so called sane Labourites were the ones pushing to Remain in the EU.
Labour voters in the North and Wales voted out in large numbers, ignoring them. The people you are calling sane have no support at grassrootes/member level of the party. They are elected MPs who are stuck in the past, and no longer represent core Labour voters.
It still may well do just that, YMB! It's only sweetness and light at the moment because so many Tories, such as the Prime Minister, are happy to pretend that they wholeheartedly support Brexit...even though they seem to have no inkling what the word actually means...having vociferously opposed it before the vote and the gullible believe them.
The Tories have always been divided on Europe and has caused it great problems over the years.
The idea that that is behind them is wishful thinking. The Pro and Anti Europe camps have just renamed as 'Hard Brexit' and 'Soft Brexit'. The differences remain and will show again.