“Si mi participación... contribuyó a la violencia en la sociedad lo lamento profundamente y me arrepiento de ello... Si hay personas que se sienten afectadas por mis palabras y mis actos, pido perdón”I can only agree with Silvio Rendon on this one (if you read Spanish, go check out his whole post here). It's not a good apology. "If I have done harm... If there are people who feel affected...". Apologising for having offended someone is not the same as regretting the action itself, and this 'sorry' takes little responsibility.
If my participation... contributed to the violence in society I am very sorry and regret that... If there are people who feel affected by my words and my actions, I ask their forgiveness. (my trans, you will probably see slightly different versions in various news articles)
Las disculpas de Berenson (Gran Combo Club)
American woman apologizes for collaborating with Peruvian Marxist rebel group (Peruvian Times)
US militant apologizes for collaborating with terrorism in Peru (Mercopress)
US citizen Berenson says sorry for Peru terrorism (Reuters)