If you're complaining that they're here, and are being accommodated, I agree with you. If we can't control who crosses our borders, they're just imaginary lines, with no real purpose.
Once they are here, though, it's a different problem: sending them back [to where? They're not all from Mexico] is expensive and ineffective. Allowing them to stay is expensive and mostly counterproductive: we have immigration limits for good reasons.
It's a sticky problem, without easy or good answers. Ideally, it's a problem that should be avoided by making the borders secure, and I think we should be working toward that goal yesterday.
The OP though, is just misleading 'clickbait', meant to outrage people who don't look too close for the truth. Which is, in this case, the DoJ's requirement that schools don't refuse students for lack of a birth certificate, or one indicating foreign birth. If the school officials believe that requires them to accept 35 year olds in K-12 schools, the problem is in their misinterpretation or misapplication of the DoJ memo.