Why do conservatives lie about their actions or inactions during the dirty war?

I don't know for sure what you are talking about. What were the actions, the inactions, what was the war, who are we accusing of weak governments and lack of human rights. Specifically what are you talking about?

Just trying to compete with the Democrats. :) Seriously though, what 'dirty war' are you talking about? Maybe the 'dirty war' in Syria where the Obama admin has done virtually nothing to curtail the violence, past present or future. Boy did that chemical weapons agreement work great! Just curious.

Genetics.

With most people, I would suggest guilt but they're politicians so normal standards don't count. They are just waiting till everyone forgets about it.

Liberals here in the USA do the same thing. Bill Clinton: "I did not have sexual relations with that woman".

Which dirty war? and why is it any of our business?

-For the Sake of Consistancy ?! ;)