"jutsu" vs. "do"
As someone stated earlier, jutsu roughly means technique and do roughly means way. When martial arts were for one thing only and that was surviving a fight, they were called "jutsu" or techniques. Then after the fall of the samauri they still wanted to retain a part of their warrior heritage so they changed the arts and took out many of the more lethal techniques and codified a way of doing something that every one would do the same way, thus "-do" or "way". This applied to everything from a tea ceremony to archery. They addded in philosophy and used the art to improve themselves.
If you look at Aikido, it followed the same path. In it's earliest forms it was very rough (the dojo was called Hell Dojo) and had lots of pressure point strikes and atemi (look at the pictures in "Budo") then after WWII, and Ueshiba got older he turned his art into a spritual vehicle and changed the name to Aikido.
This does not mean that a "-do" art can't be used for self-defense, it just means that the art has been modified to emphasize personal development over fighting ability. And this is usually the main argument I hear/read about from people in Aikido. There are both aspects to the art the "jutsu" of the art and the "do" of the art. O'Sensei taught both and people learned both, but they argue which is the real aikido.
I hope this helps out some.