Some people with weakend immune systems from things like cancer can't get vaccinations. So when someone else becomes a carrier because they didn't get vaccinated they can pass it onto that person and kill them.

The Uniform Code of Military Justice (The U.S.'s rules pertaining to how soldiers are to act) states that, yes, any unlawful or immoral order, as defined by the Geneva Convention, can be disregarded. In fact it is your duty to disobey such an order. (UCMJ) 809[890].ART.90 (20)

It's saying she wants duck pics

Not in a mausoleum.

Read further down in the article, they explain that it is actually photoshopped.

His bio says "there was already another uniquedude"

Sometimes you look down the sight with no intention of firing so that you can see further down range.

His shows are more about him showing you what to do if you are in that situation, they aren't about him having to survive with real stakes.