I had read in Atkins that the only carbs that mattered were "sugars" or insulin impacting carbs. My question is bearing in mind that CKD's generally recommend a 20g limit(carbs/per day), could I then consume up to 10 slices of bread as long as the label states; Carbohydrate Per slice----20g of which sugars-----------2g 10 slices seems excessive!
Yes, it is excessive. The rest of the non-sugar, non-fiber carbs in the bread will impact insulin. It's not just the 2 grams of sugar that matter.
This is just Atkin's simplification of how insulin effects the body. It's a lot more complicated than this. Some carbs raise insulin higher and longer than others. Sugar raises insulin levels sky high. Read massive eating and Berardi's article on how insulin works.