Ethics

I have never studied ethics formally. But there are a couple of issues that occupy my mind these days that involve ethics.

1) How valid (or ethical) is it to have people who don't master a certain subject to an elementary, acceptable level "teaching" that same subject? How can someone who can't tell the difference (because he doesn't use it properly in using the language) between "saber" and "conocer" be "teaching" a Spanish class and grading assignments where the lack of ability to tell the said difference is penalized?

2) "De orígen mexicano, el patrullero que abrió fuego"
How can someone whose parents (or at least one of his relatives or loved ones) most likely became citizens through the Amnesty Act of 1986 because they arrived in this country ilegally, hold a job as a Border Patrol Agent? He would not be able to work -hell, he wouldn't even be here- had his parents not come here. Was he born here? Is he a naturalized citizen? Were his parents born here? Many important questions remain to be answered in this story.