How to get bias into a Wikipedia article

This essay, written as a guide to introducing bias into Wikipedia, describes tactics its author says he observed in Middle East articles, such as creating many overlapping articles to capture search traffic and labelling critics as "left wing" while leaving their accusers' politics unidentified. The author gives examples involving Gideon Levy, whose positions he says are kept vague, and Jaakobou, whom he quotes as urging that Levy's controversy be downplayed. The piece also cites Jaakobou's dispute with Peace Now over a government report citation, which the author presents as an example of attacks on source reliability.