Pons already disproved your first assertion, so I won't bother. I'll focus on the bolded.
Again, I have no problem with immigrants settling here to seek autonomy and pursue happiness. Why not come here LEGALLY though? Just answer this question rather than assuming I'm xenophobic.
Pons' argument is invalid because Mexico deports those that are involved in drug trafficking activities. According to Mexican Law the government is banned from recurring to deportations based on migratory status. Hence, no migratory system is in place and the deportations related to drugs are carried out by the federal government.
Why not coming here legally?
Well, the legal process is not just filling an application and hoping for the best.
Let me quickly relate the way it is done: (All of this is just for clarification purposes.)
The applicant gathers the necessary documents for initial application. These documents involve bank statements from the moment the account was first created. Original copies from all purchases such as vehicles, houses, apartments, land, etcetera, have to be turned in within the application. Affidavits from family, friends, and close acquaintances have to be turned in also stating relevant information about the applicant, these affidavits may not be less than 10 and/or exceed 20 (Notarized). Original documents from primary, secondary, preparatory, and higher academic institutions have to be turned in followed by a written statement from the administrative official(s) at said institution(s) (Notarized).
A valid passport, which is very hard to get in 3rd world countries, and a letter from the interior department of such country acknowledging the desire of the applicant to leave the country for a relevant period of time. 8 Passport-size pictures of the applicant very well groomed with no piercings, glasses,etc. A letter from the doctor stating your health status and all medical records. The most important part of the application is a check, per person, with the value of $2000 dollars (adult) and $750 for children. If it is a family of 5 individuals the price is reduced to $850 per individual.
After the application is sent, Fedex only, somebody from Washington will receive the package and stack it for revision. After a period of 3 months to 1 year maximum, the application is fully revised and sent to embassy dictating the future of the applicant where I deem your application worthy of revision, once again. If I like the bank statements I let you pass, if I dislike your primary institution I say bye-bye. If I notice your car is just like mine and your apartment is at the beach and I like it, I let you get an interview appointment. It is all matter of luck and contacts.
On the day of the interview you are expected to arrive 2 hours early, mind you the line to access the embassy is 4 blocks long and thus you will have to come by 8 hours before your interview and stand outside.
After you enter you are briefed and checked for weapons, just like the airport. You are told to sit down along with 100 people and wait your turn. The interview might last from 5 minutes to 1 hour, it depends in my mood. If you are wearing a piercing in your eyebrow or have a tatoo on your face I cordially let you know to exit the embassy before starting the interview. If it all goes well, I congratulate you and then invite you to go ahead to the next booth and pay the amazing amount of $1000 per card covering impression services. The Fedex has to be paid by you when it arrives. Meanwhile, you can wait 6 months to receive your legal document. Yay! But wait, there is more! If I know that you lied to me, whether it was your chronic condition or your primary school name, I can terminate your status even before you get the physical document and erase you from future applications for the next 5 years.
Now, as you can see the process is a pain in the **. And no one wants to put up with those kind of things. Well, at least not a person that has the immediate need of finding a job and provide food and support for his family in starvation.
Also, the application process varies in every country and type of visa!
And I forgot the Tax statements. They are very important. If you paid late your taxes that is enough for you to get denied.
Blessings!
-M