A remarkable combination of superstition, hysterics and some accurate and reliable info. Sorting it all out is tricky, much better sources of info elsewhere.
"Opinions by Anonymous" is a good clue to avoid this if you're new to the topic. Highly opinionated piece.
-Ayoob's book is supposed to be good, but several firearms instructors also say that its dated.
-Fackler was a surgeon and DOES NOT just base his opinons on gelatiin alone.
-Ayoob was a small town cop and never involved in any actual shootings. He's also made money as a writer of some pieces with a bit of theater to them and has started at least one internet myth, repeated here as "never use reloads for self defense ammo". A predjudicial, blanket statement, call all reloads junk, when in fact some people can make better reloads than factory ammo. Personally, I've never had my own reloads fail, but have had a Federal factory round squib.
-Saying one should only carry HP ammo, period. JSP's will expand just fine and don't have a HP to clog with denim.
-HP ammo IS more lethal than ball ammo, for the devestation it causes, but that's not a bad thing if its what it takes to stop an assailant, and i'm not "worried about my attacker's safety".
-There is no shortage of moral, legal complications and expense" you will experience from wounding a man as opposed to killing him. What minimizes all that is if you are justified in shooting. Guns and ammo arent what change those factors.
-Idiotic blanket statements about "never use 147gr ANYTHING" show a remarkable lack of experience in firearms.
I could go on but lets just say its safer to find info elsewhere.