No evidence. We are now talk evidence. WOW!!!
There no evidence that dreamers take away jobs. How is that determined? If a White gets a job, did they take that jobs from all those of another race? What about if the White is male, did they take the job away from Females? Or is this an admission that "Dreamers" aren't work, living of others. 
And since there is no evidence then don't we need to continue to investigate this more, and deeper, looking into ALL aspects of what "Dreamers" are doing.