As a person that has sponsored several family members (in-laws) to immigrate to the US LEGALLY, I am the first to say that the process is very long, difficult, and expensive. However, it, by no means, excuses ILLEGAL immigration in any way, shape, or form.
It's like I told my wife in 2006 when she was naturalized after a 17 year process. Gov. Mitch Daniels had just handed her the certificate of US Citizenship. I said, "Dear, this process would have been much faster and cheaper if you had first learned to speak Spanish and hop the southern border." Gov. Daniels looked upon me with a slight smirk of apparent agreement but didn't dare say anything because the press was there.