Obama--Build "Moats" with alligators on the border?

Recently, in a speech about immigration reform, the President of the United States ridiculed those who want to secure the border before moving on to immigration reform by suggesting that those people want to build moats on the border and fill them with alligators.
First of all, I don't think the fact that the border is so porous that drugs, the cartels that transport them, murderers and thugs cross it with impunity is anything that the President of the United States should be joking about. Secondly, the speech was, to say the least, disingenuous at best, and filled with prevarications at its worst. The truth of the matter is that Obama wants to get the illegal aliens here made legal so he can get their votes. Leaving the border unsecured and instead attempting to demagogue the issue for votes is actually quite cynical. The truth of the matter is that people of Latino descent are as concerned with border security, provided they are here legally, as anyone else. To assume that just because someone is of Latino descent that they are for making illegal aliens legal or that they are all for a porous border is racist.
So, here is my suggestion for the southern border. Let's secure it. Let's stop the murderers, thieves and drug dealers from crossing it with impunity. If that means putting troops there, so be it. If that means putting up an electrified fence, okay. To just let hundreds of thousands of illegal people come here every year, who knows with what intentions, is to leave the country unsecured. The first thing the President swears to is to enforce the laws of the United States. This president has abrogated his responsibility to appease his leftist political base. That, in my opinion, is an impeachable offense.