The publisher of this "Study" is from New American Economy, a think tank "fighting for smart federal, state, and local immigration policies that help grow our economy and create jobs for all Americans." So I don't think it is 100% neutral in terms of its view on immigrants.
But do you suspect the methodology, the results, or the conclusion were "faked" or inaccurate? Or do you consider it an accurate piece but suspect the reasons behind publishing it? ...And suddenly a wave of downvotes in less than 2 minutes. No justified concerns attached to them though.
Selective definitions were used. They weren't hidden for anyone willing to look into the details, but if this was a political move (I'm not saying it was, but if it was) then the people who did it would know full well that the headline would have far more penetration than any statistical critique with how terms were defined. Another poster here used the term 'slight of hand'. One could describe it, if it was a political move, as a form of deceit without being an outright lie.