I don't get the aggression people have for someone using different brand.
People identify the business decisions that Apple makes to be anti-consumer. They then feel frustration and anger for users of Apple products as support for their products only emboldens Apple to continue making anti-consumer decisions, such as the subject of this article.
Apple is a microcosm representation of the evils of capitalism for many people and they project their feelings about it - powerlessness, disgust, anger, etc. - onto users of Apple products. People associate support for iPhones which enjoys a 61% US market share as support for the boot of capitalism on our throats regardless of whether the Apple user doesn't know, doesn't care, or doesn't agree.