Harlen Ng wrote:

Can someone point me to a website that explains the
reasons and risk of opting out of auto rental optional
coverages?

Options a
- CDW - covered by some credit cards
- Personal accident insurance
- Liability insurance
- Theft protection

Also, I read somewhere, if renting in Europe, one
should take all the optional coverage (Inclusive)?


You need to call your insurance company and talk to them - not anyone on Usenet.
Ask them what you are covered for and what they advise.