This 'Corbyn is a Marxist' is getting a bit like McCarthyism, isn't it?
I would argue, as I did at the time of the 2017 GE, that there is nothing particularly radical or 'Marxist' about the Labour Manifesto; it certainly isn't as radical as the post war Attlee policies and proposes nothing more radical in the way of social policy than can currently be seen in other European countries. As I have noted elsewhere recently, surveys have shown that Labour's social policies are approved of by a majority of the UK population so long as they don't have the word 'Labour' attached to them. Fear of Labour isn't rational, it's a product of relentless right wing propaganda from our largely right wing press.
When choosing a party to vote for we have to consider what it promises in its manifesto. There is nothing revolutionary in Labour's manifesto.
On the other hand, it seems that we are in the middle of a revolution now, brought about by the tories, no less. It's a dangerous revolution that is attacking our Parliamentary sovereignty and attempting to impose a dictatorship. It started with the imposition of fixed term parliaments by the Cameron government, which makes it well nigh impossible for our sovereign Parliament to get rid of failing governments and is continuing now as the tories steamroller through the parliamentary procedures and conventions in order to overcome the will of the sovereign Parliament. It is unprecedented for a government to be held to be in contempt of Parliament, as ours was last week and will be truly frightening if it gets away with it. Because the whole of our parliamentary system is set up to provide a check on the power of the Crown (i.e Her Majesties government) and so prevent an elected dictatorship.
If you're worried about a revolution if Corbyn gets into power you had better start worrying now about the tories destroying our Parliamentary sovereignty because they are paving the way to allow it.