‘insidious’ (line 2)means

The endeavor to maintain proper standard of fairness in journalism must be pursued. It is fatally easy for the journalist to deviate from the straight path. There is his natural desire to ‘make a story’ and insidious temptation to twist facts to square with his paper’s policy. Both are as indefensible as the framing of misleading headlines for the sake of effect. The conscientious journalist must check any tendency to bias, and guard against the dangers inherent in personal antipathies or friendships, and in traditional oppositions between rival schools of thought. When a political opponent, whose stupidity habitually provokes attack, makes an effective speech, honesty requires that he be given credit for it. Where personal relationships might make it easier and more congenial to keep silent than to criticize, the journalist must never forget his duty to the public and the supreme importance of recording the truth