This is very wide topic and I would like to not discuss it over Internet because I've had plenty of similar discussions with people I've met, and it would really require us to write essays :|

Soviets killed about six million of polish people (until 1956). Not to mention harm that was done to the polish culture, dignity, economy, science for the 45 years.

I think you're confusing Rusians with Germans. The most radical calculations mention 20 million as the collective number of people killed under the Stalinist rule, mainly Russians. Polish deaths were at most half million:

https://en.wikipedia.org/wiki/Soviet_repressions_of_Polish_c...

> I would like to not discuss it over Internet because

So you would like to make your statements, but not to have them challenged?

> Soviets killed about six million of polish people (until 1956).

[citation needed]

> So you would like to make your statements, but not to have them challenged?

Oh dear, I didn't even point single statement yet.

Those people are not part of "us", you see.

Or the 3 million Polish gentiles that were also killed? Remember that Poland lost 6 million citizens.