People watch TV to escape reality... the parallels between this and the war on terror are... well, blatantly obvious but best not to dwell on this.
Honestly though - how could you POSSIBLY think to yourself "I want to destroy an enemy planet, the first thing I'll do is test it out on their planet so they know I'm going after them."
Some Klingons thrown in for good measure and off they go to embark upon their war on terror. Not to mention MORE angsting from T'Pol if she's going to leave Enterprise. Which is pointless.
For a season finale in which 7 million people die... there isn't all that much action or pathos - especially given the fact Trip loses his sister. Anyway, the Duros plot feels horribly tacked on to provid some action in what is essentially a scene setter for season 3.