My Ragdoll cat gets poop on the hair of his behind and legs when he squatts to poop. Can the hair be cut to minimize this/ If so can it be cut short or just trimmed a bit with a scissors?

I would say that you should wash the hair first, and then, with clean scissors, trim the hair, yes. Don't shave him bald though or cut too close to the skin.

Try changing his/her food to a dry food and extra water, it will change the stools