Ill give you the point of view of an outsider.
Im a Mexican , born in Mexico , living in Mexico, who has never even considered the idea of going into the US for anything other than a vacation.
On the point of anchor babies, most of the people i have talked to they all agree that children should be with their parents , if the parent broke the law, then he should be deported and their children with them (but they should keep their US citizenship, so when they're 18 if they want to go back to the US they should be able to do so LEGALLY).
Most of my fellow countrymen agree , if trump wants to build a wall, let him , it won't change a thing. If you truly believe that mexicans a 'pouring' through the border then you are letting yourselves be blinded by anti-immigration propaganda. Most of illegals are people who enter the US legally but overstay their VISAs (much easier & cheaper to apply for a VISA) and then once accross just stay there than it is to risk death by crossing illegaly.
Also , you guys realize that you have thousands of Asian illegal immigrants? they did not cross from mexico you know.... are you gonna build a sea wall? you do realize that mexicans have boats too ? and its a much shorter ride from our coast to yours than it is from China's. if you build a wall across the land border all the cartels have to do is do what the chinese do to bring illegals to your country.
Also, i've seen many statistics showing that the net immigration from Mexico to the US has been in the negatives for the last few years , which means that more mexicans are going back into mexico rather than leaving it. If you build a wall you're just as likely helping to keeping them there.