Politics is consensus

> Apple agreed with Stallman's beliefs to the extent that they thought that using WebKit ([...]) was better than developing their own rendering engine from scratch, which they surely could have done.

The problem is that Apple did not (at the time) have the resources to deal with Yet Another HTML Rendering Engine. Trident, Gecko, Presto and KHTML/WebKit were the most used ones at the time for testing by webdevs, Trident and Presto are closed-sourced and Gecko was at the time MPLd -- so LGPLd KHTML was the natural choice for them (IIRC they tried to buy Opera at the time in order to acquire Presto, but my memory can be playing tricks with me, and a quick google only brings "facebook wants to buy opera" stories)...