The CZ 75 decocker: can it cause an accidental discharge? 

Yep, mechanically it's almost impossible. Thank you sir!

thank you sir

Thanks man. I really can't stand videos like that so I try to avoid it.

Thank you sir!

Glad I could help!

I still don't see how decocking would provide enough force to actually ignite.

I thought it didn't actually make contact with the firing pin, but I could be wrong. Really just looking for verification on how this works. Is that what the firing pin safety stop is?

No, because the decocker is mechanically lowered by the hammer as it goes forward, which reengages the sear to catch the half-cock notch. So even if the FPB was not working, the half-cock notch will catch the hammer.

Late answer but lemme explain. A decocker is a mechanism that drops the hammer on a DA/SA gun onto the half-cock position normally. If you rack the slide to put a round in the chamber, what you have to do is push the decocker lever with your thumb, and it'll make the (previously full cock) hammer go forward in the half-cock position. Basically reverting it back to double action with a lever alone, and double action is safer to carry than single-action. However, some people have become super good with manual safeties, and you can (and are supposed to) carry a manual safety gun cocked and locked (hammer fully back, a round in the chamber, and safety on).