Collective Self-diffense

I read some articles and opinions about Japan's collective self-defense. Many Japanese people opporse the government new policy for the issue. They say Japan will attack the third countries or send troops to other countries. In addition, they said some Asian countries object the changing. 

I believe they are wrong. I think Japan has already used collective self-defense right before. Some peace keeping activities for U.N were exactly that things. And if you carefully read the cabinet's statement on the right, you could understand Japan won't use military power for attacking other countries. The government use troops only when our country face severe crisis that will destroy Japan completely.

Of course, I believe Article 9 of the Constitution should be changed. That would be better.