Not at all. What I am implying is, it doesn't matter if it's feces or chemicals. If feces were no longer allowed to be used for fertilizer, then the panic would be on chemicals in our food and possibly to the point of banning chemical fertilizers to opt for organic fertilizers.
It reminds me of coal strip mining in the '60's that was sooo awful to our environment that it no longer was an acceptable way to product energy. So we went to nuclear and then lo and behold strip mining is more acceptable because of the horrors of nuclear energy that were conveyed. Fear mongering however seems to be perpetually acceptable.
The problem with eating poop from Mexico is that they have a lot of hepatitis A, pathogenic E. coli, salmonella, shigella, cholera and other diseases in that poop. If the human sewage used to fertilize doesn't contain a lot of diseases --- I guess it'd be safer to eat.