The appeal of populism is that it gives "easy" answers to the problems that anger the ignorant masses.
What's complicated about illegal immigration? Simply enforce the law. That's the only thing you need to know.
Which laws?
Be specific, and cite the parts of federal criminal code that you're referring to.
Let's begin with this one, which states plainly the process by which aliens are granted citizenship to the US.
8 U.S. Code § 1181 - Admission of immigrants into the United States
This one should have kept the illegal immigrant who killed Kate Steinle from entering the US. But nope. Sanctuary cities.
8 U.S. Code § 1182 - Inadmissible aliens
And this one
8 U.S. Code § 1227 - Deportable aliens
Or this one
8 U.S. Code § 1231 - Detention and removal of aliens ordered removed
Or this one
8 U.S. Code § 1302 - Registration of aliens
And this one
8 U.S. Code § 1321 - Prevention of unauthorized landing of aliens
And this one
8 U.S. Code § 1325 - Improper entry by alien
Or this one
8 U.S. Code § 1326 - Reentry of removed aliens
Ok, good. Now we've got some laws to work with. Now, all you have to do is show which ones aren't being enforced.
Let's take Juan Francisco Lopez-Sanchez (the suspected murderer of Kate Steinle) as an example.
Which of those laws do you believe were not enforced?
Take your pick:
8 USC 1181(a)
8 USC 1182(a)(10)(h)(2)
8 USC 1227(a)(2)(A)(iii) and (a)(2)(B)(i)
8 USC 1231(a)(1)(A), and (a)(2)
8 USC 1302(a) and (b)
8 USC 1321(a)
8 USC 1325(a)
8 USC 1326(a)(2) and (c)
No, trying to overwhelm me with an excess of information isn't going to work. I'm not going to do your work for you.
You need to specifically cite which laws were not enforced, and how.