Since Theresa May announced a snap election, the Labour Party's campaign has transformed into nothing short of a tragedy. For those who want an idea of what a Labour government would look like under Jeremy Corbyn, the last few weeks should give you a pretty good idea.

Disaster in the shadow cabinet

Diane Abbott has emerged as a social media star since her awful LBC interview, with people sharing memes of her portraying her failure to add up properly.

Angela Raynor, the shadow education secretary, has got off lightly in comparison, considering she also embarrassed herself in an interview. The shadow chancellor, John McDonnell, has recently had his past exposed for encouraging illegal strikes and has no doubt purposefully humiliated Mr. Corbyn by contradicting the latter over how cost-proof Labour's manifesto really is. And as for Jezza, his past of sympathising with the IRA and his wild suggestion that British soldiers died for nothing during the Falklands War have all come to light.

Mr. Corbyn and the current shadow cabinet, who still believe they are the next government in waiting, are destroying the Labour Party.

Their vision of a Venezuelan Britain is both frightening and calamitous. But responsibility for this travesty should not rest entirely with the current Leader of the Opposition. Lest we forget it was his predecessor, Ed Miliband, who enabled the general public to vote over the Labour Party leadership from the moment they pay their membership subscription. In the Conservative Party, you have to wait three months before you are trusted with this privilege, which is why they managed to avoid the same calamity during the summer last year. This was a foolish error on Mr. Miliband's part that has allowed Labour to elect a leader who only ten years ago, Mr. Blair and Mr. Brown had enough sense to keep on the backbenches, along with Mr. Corbyn's other comrades.

And the rest is history.

What is Ed Miliband's part in all this?

Of course, Red Ed deserves to be blamed for Labour's mess too. His brother would have been a far more competent leader. In fact, he would probably be prime minister now if Labour chose the right brother. Ed Miliband, in contrast, failed to organise his centre-left party into an effective opposition and offered policies that were quite moderate compared to his successor's. They sounded wonderful at the time to many young people struggling to cope after the 2008 Recession, but thankfully voters had enough common sense to return David Cameron to 10 Downing Street.

Yet who put Ed Miliband there and allowed him to lead Labour to a disastrous defeat in 2015 and contributed towards Mr. Corbyn's rise to power?

The unions. Labour's electoral college in 2010 demonstrated Mr. Miliband had significant support from the unions and other affiliated organisations.

The same thing happened in 2015 during Mr. Corbyn's first leadership election victory. He received an overwhelming amount of support from trade unionists. Unison members did the same during last year's leadership contest.

By selecting two awful leaders over a period of seven years, twice in Mr. Corbyn's case, the unions have hijacked the Labour Party and reversed the progress Mr. Kinnock and Mr. Blair made in the 1980s and 1990s respectively to win support from the centre ground. And now, Theresa May is spouting left-wing policies in a bid to win Labour voters.

The unions have essentially paved the way for more than twenty years of Conservative rule.

Both Miliband and Corbyn should take the blame for Labour's demise, but it was the unions that set the party on this path.