[Star Wars] How does hyperdrive work in relation to loose items/people when they make the jump to light speed?

I was playing the new SWBF2 campaign, and there's a bit where some X-wings fly inside a star destroyer as it's preparing it's jump to light speed. They are flying directly under the hyperdrive engine in an attempt to disable it (if I remember correctly).Now of course, as far as I can see, jumping to light speed is just incredibly fast acceleration as shown in TFA when the squid monster thing (Gundark?) was on the front of the Millennium Falcon and was blown to pieces, but how does the ship protect those inside from the same acceleration? How is the ship not ripped to pieces? What about loose cargo inside? And finally, what about other ships that are inside the body of another spacecraft but that are flying about such as the aforementioned X-wings inside the body of the star destroyer, but not touching it physically?Just something that's been bothering me recently.