A majority of the public says immigrants work harder than most blacks at low-paying jobs, but the margin is not as wide as when the comparison is made with white workers; 56% of adults agree that most immigrants work harder than most blacks; 30% disagree and 14% say they don't know. Analyzing the responses to both sets of questions by the race of the respondent yields some interesting patterns. Blacks are even more likely than whites to say that their fellow blacks are out-worked by immigrants at low-wage jobs. Some 64% of blacks hold this view, compared with just 55% of whites.
Source: Pew Research Center