I wouldn't want to discourage you from taking an interest in politics. But don't you think there are many people who wouldn't mind expressing their reservations about the wisdom of the Iraq war without calling our PM a murderer.

Is there a PM in history who didn't take decisions that ended with people getting killed?

You may not like Blair. Lots of people see him as the best Prime Minister available, but they don't like the Iraq policy, and they haven't from day one. You are excluding all these - people who may feel even more strongly on the subject than you do, an moreover people who may have made a worthwhile contribution to your cause.

Decide what you want to do, make an effective protest, or dick about like Peter Cook in his Dave Spart persona.