There are many benifits for that...it is a political game..

Nijad delivered this speech not just to cause hate...it is a strategy that he follows..West is trying to destroy Iran so Iran will have to defend itself...bring the world attention to genuine criminal (Israel, US, UK to name a few)..I am not saying Iran is a perfect state..but it will make its voice heard...

Additionally, the situation is not quite as you just described.

Read this:

http://www.presstv.com/detail.aspx?id=88491&sectionid=351020202