Step 1: start by bringing up something negative about a person that has absolutely NOTHING to do with the issue at hand.
Okay, so the guy resigned because he did something bad. How does that make what he experienced while there not true? Oh, that's right, it doesn't. And the admission of fraud isn't a "crucial piece of context." You and I both know that. Unfortunately, you think the reader is dumb enough not to know it.
Step 2: Assert statements in the form of a question so that you can deny every making the assertion.
"Did Ms. Kantor’s editors at the Times ask her whether Mr. Olson might have an axe to grind?" Here, we don't actually assert that Mr. Olson has an axe to grind. We don't assert he's purposely lying to get revenge. We just highly insinuate it and make the reader believe it by putting it in question form.
This is an obvious attempt at character assassination and to cast doubt in the minds of the reader without actually saying he was lying.
If Mr. Olson is lying - sue him. You're within your rights to do that. But you're not suing him. Or the Times.
So, what's the point of this? Propaganda. And sleazy propaganda at that.