I believe in socialism, but I feel Stalin shouldn't be idolised due to things like the Gulag.

I would like more people to become socialist, but I feel not condemning Stalin doesn't help the cause.

I've tried to have a constructieve conversation about this, but I basically get angry comments calling me stupid for believing he did atrocious things.

That's not how you win someone over.

I struggle to believe the Gulag etc. Never happened, and if it happened I firmly believe Stalin should be condemned.