The thing that brought this up was this post that I found in a subreddit,

If anyone ever has to deal with the "You white people held my people as slaves." bullshit. You can easily piss them off, but only if you're of irish heritage. The Irish went through a very similar deal of being slaves. Except theirs was 10x worse than the African American slaves in generally the exact same time period. Often referred to as the "forgotten white slaves." Not only were Irish slaves cheaper, but there was absolutely no regulation on how they had to be treated. Black slaves in America were considered property, owners had to provide them with housing, food, and water. Regardless of the quality of those things, that's still better than what the Irish dealt with. Because they were considered tools, not property. You could break and kill your tools and go get a new one for very little money. So anytime a stupid black person pulls that shit on me, I explain how my ancestors were slaves around that time period too, and yet I'm not bitching about it.

Now I cant tell if there is a kernel of truth in it, or if its just a incredibly racist form of badhistory, that's trying undercut the struggles that African-Americans faced in their past by saying that white people went through it too. Any response would be great, thank you!