I think it's fair to say that the poor Irish and the German Jews had more of a choice than the enslaved Africans.
For example, the Jews certainly didn't have to go to the USA specifically. When they got there they had some degree of choice where they lived, what they worked at, and so on.
And most importantly, in both cases they were going, or at least hoping to go, toward a BETTER thing.
Of course none of these people's situations was good, but they're not really comparable.