I feel your headline is misleading. By the same token, I could post a headline that says "Why the Right Supports Government Control Over the Female Body."
The report you have quoted is from the Center for Immigration Studies, a think tank that has not been held in high regard by many researchers and experts. Last year, a CIS report was used to justify the southern border wall, stating basically that the wall would pay for itself, something that turned out to be unverifiable. (In facf, the study the CIS report was mischaracterizing concluded that reducing immigration actually would shrink the economy..
https://www.factcheck.org/2018/03/will- ... or-itself/)
Although I don't use the phrase, some might call me part of "the Left." I don't support anything "illegal". However, I do believe our immigration system is a total mess, and needs to be approached with a much more nuanced solution.