To make pork for sliders, lightly grease a crock pot insert and place pork tenderloins in crock pot. Mix together BBQ Sauce, soy sauce, brown sugar, and red pepper flakes in a bowl and pour into crock pot. Cover and cook on low 7 hours. Shred pork with 2 forks and continue to cook for 15 to 20 minutes.
To make SPAM®, slice into 1/2 inch slices and cook until browned on both sides in a nonstick pan coated with Vegetable oil. Cut each piece in half so that it fits on the rolls.
To make slaw, mix together mayonnaise, vinegar, soy sauce, and sugar in a large bowl.
Add coleslaw mix, shredded carrot, pineapple, and green onions and stir to mix well. Sprinkle macadamia nuts on top and refrigerate until ready to use.
Cut rolls open and fill half with pork filling and half with SPAM® slices. Drizzle with BBQ sauce and top with coleslaw.