Kale gets such a bad wrap when brought up in conversation on the interwebs. Some don't like the texture, and others don't like the flavor. For some its too bitter, and for some its too earthy. You can't please everyone, but you can teach them ways to make that they may not enjoy due to lack of knowledge on how to treat it, better. And massaging your kale will definitely make it better.
First of all, what does it mean to massage your greens? Well, once you've washed all debris from them, and allowed them dry a bit-simply add your favorite salad dressing or vinaigrette. You can also use some mashed avocado, or grated garlic. Then, using your fingers-squeeze the greens in your palm, and also rub them between your fingers. You want to work whatever wet agent you're using into the greens until they become dark in colour. This is when you know the magic is happening.
The greens will become more tender, therefore making them more palatable. Not too mention, whatever flavor agent you used will be absorbed into the greens, making your salad to be truly something enjoyable. Once your greens are nice and dark in colour, go ahead, and proceed to add your other ingredients, and finish it with a little more dressing, or a squeeze of fresh lemon, orange, or lime juice. And if you read my post on seasoning your salad, don't forget your kosher salt, and pepper. 