Ed Miliband did NOT 'stab his brother in the back'

But the violence along side those policies have nothing to do with socialism. Socialism does not advocate a dictatorship or violence.
It's an economic ideology.

I want far greater restrictions on capitalism. Taking the good bits but reducing the huge inequalities and the downsides of capitalism.

But Marxist socialism does advocate violence and that is precisely what you were defending!

We already have massive restrictions of capitalism, government spending as half the economy and various corporatist fusions of state power and the banks.

Marxism has many elements, many spot on, many not. But things such as abuse of power at the top to the disadvantage of the working classes was spot on. As is how the law reflects the interests of the powerful.
I want FAR greater restrictions. Far less inequality, less tax avoidance and abuse higher minimum wages and an end to worker exploitation.

So how much government spending as a proportion of GDP is too much? 50%, 60%, 70%, 80%.

Nothing to do with the point I was making.
Ideally I'd like more socialist policies.
Germany's railways are nationalized and their service is far cheaper, far more reliable and far more efficient than ours..
For one example.

Insurance healthcare system though.

Ed was driven by blind ambition, what good did he eventually do for the Labour party and the country when he became leader ? His brother had the better chance of becoming Prime Minister, even the Tories were scared of this happening. Ed should have settled for a senior cabinet position and helped his brother become Prime Minister. Unfortunately ego is such a big thing in politics, and so without blinking Ed Miliband stabbed his brother in the back, on a very public stage. The worst career move he made in his life!

No, I think Ed believed in his "causes" and brand of socialism.
His motivation was "the cause", not ego or personal ambition.
David would have been more electable as an ideological 'heir to Blair'.
I'm not a fan of either Miliband and have never voted Labour.