The thing is, that's been the prevailing mindset of many for a long time, however, people prefer to sweep it under the rug because they feel it will undermine our posture in regards to the US treatment of Mexican immigrants.
Mexico deports way more people than the US and the abuses immigrants have to deal with are well documented but few times is it brought up in such a way. The other candidates had better postures including a couple that promised to set the example, by improving treatment of immigrants coming to Mexico while also supporting those going from Mexico to the US and other countries.
This election is going to be a thing, I'm not looking forward to it. The first election I voted in saw the return of PRI to power, can't wait to see what happens this time!