Then what is it? A teapot in the sky?
If it's a viable plan which can be realized, then how to achieve it, without killing people and creating a dictatorship? Is it possible?

I might be wrong, but it seems to me that any effort to establish communism will eventually fail with a lot paid in vain, and many lives lost, as has happened so far.

If that viable plan needs time to be accepted more widely, then maybe we should simply wait and try to be decent people in the meantime, instead of trying now to establish a "temporary" dictatorship actively as a way of "transition". And if the plan can be acted upon right now, then again the question is how (without resorting to violence and tyranny, of course). That question remains open to me. And it's a big one.