I see this directly on my team. The h1bs get bullied by their boss (it's a split team, I work with him but don't report to him) and they don't say anything because he could effectively have them deported. At least 2 of them have kids here and perhaps the others do. So not only does it incentivize the bully to do it, but it traps them to just take it for their family. I openly talk shit back to him because he can't deport me.