I think it's a tragic situation. Does the fault lie with the father who only hopes to give his family a better life than he had? Or the corrupt governments in Mexico that created the environment where people leave their country to attain a decent life for their family? Or the inconsistent US immigration policy which at times have welcomed illegal immigrants, punctuated by periods of rigid enforcement followed periods of amnesty?
Both governments are guilty of what you say. It makes the choice illegals made easy to understand, but it doesn't excuse it. Ironically, I think part of the reason the number of Mexican illegals has gone down sharply over the past years is because the U.S. has been sending jobs there. We like that Mexican illegals are reduced, but now we are going to make it harder for companies to do business there, which will make the Mexican economy harder for folks again, so more will again try to come here.
Once we build the wall, they'll start coming other ways. Like boats. Meanwhile, Trump wants to cut back Coast Guard funding. It should be increased, not decreased, considering what will happen once the wall is built. It won't be just people getting smuggled; it will be drugs.