So right Annibach it's out with the old and in with the new. It takes time to realise that there is no new wheel, there has always been someone who invented it before they did.
Momentum though has one thing that I have not seen for a very long time, not since the off spin socialist groups who hid under that term, but really were communist's. Momentum appear to be thinking big. Their ambitions are fuelled by opportunity through Brexit, facilitated by modern technology and their propaganda is distributed on the high end of information technology and all that it offers in promoting ideology to the young and inexperienced. They also seem to be recruiting from the young graduate/professional classes, with far left socialist ideology that justify's for them their privilege. When it comes to treating people in the Labour party with respect and equality, as you have exposed on GN Annie, those basic's of their ideology seem absent, demonstrated in the intolerance of some Labour Party members and MPs who stand up against things that they see wrong in the Party.
Their plan seems to stay in the EU but not for the reason's that other remainer's want to. They want to 'democratise" the European Parliament, on that I agree, but that is where agreement stops for me. They also intend Nationalising all things, including financial institutions, which would be easy to do through taking over the EU because of their regulations, rules and directives, the system lends itself to control of 27 Country's.
They also state they want to introduce a Europe wide socialist centric organisation. So similar ideology to JC I think although you will know more about this than me, but from a very different perspective I think. The destruction of Capitalism in favour of the people seems to be a key cliche'. Little knowing or understanding that we have been here before in a fifty year experiment in Russia, that destroyed thousands of lives (their own people) and brought Russia to Bankruptcy. Russia embraced Capitalism not because the powers that be wanted to, they needed to feed their people and protect the rich, which sounds odd in a Communist society, but nothing, even Communism is ever as equal as imagined in the ideology.