The problem is that part of his base wants these illegals gone, the other part wants their labor—cheap, or skilled and learned by using the US education system. Thus, why kick out people we paid to educate who are now doing useful jobs and by DACA rules paying Social Security.
What is being forgotten in this meme is that regardless of educated or unschooled (not stupid, but trainable for specific tasks, like slaves) is that they dilute the labor market to undercut the value-in-use of native-born children and citizens.
As a PhD student, post-doc researcher, and many years as corporate scientist, I saw that universities and technical giants advantage themselves by bringing in foreign students who will work for slave-labor wages on faculty-supervised projects and grants under such living and working conditions as to make pursuing a technical higher education unattractive to home-grown talent.
Corporations prolong the stay of these aliens by hiring them to displace scientists and engineers who had previously built the businesses, and expected to benefit from the investment of their time and talents in creating new product concepts, only to find themselves discarded after they have taught their hard-won skills to their cheap foreign replacements.
Thus the corporations wind up with the patents and wealth gained from them, with the inventors and application specialists left on the outside without the fruits of their labors accruing to themselves and their children. Who can rejoice in this kind of atmosphere? Is this the kind of "capitalism" that benefits the general population? Or in the end, only the "one-percenters"?