in terms of pure numbers, stalin's holocaust of the ukrainians was larger than hitler's holocaust of the jews. i've seen a lot of criticism of the conflation. but, it's rooted in a denial of how brutal stalin was. a lot of the outside world sees the soviet union as liberators and gets confused by it. but, it's easy to understand the conflation from a ukrainian standpoint if you're aware of the history.
you don't need these kinds of restrictions here in canada because they're universally reviled.