For the secular leftist, the end state is social and necessarily political. It is all about getting everybody else on board and herding them into his imagined utopia. There are so many “problematic” aspects of life that need to be reengineered, so many vast social systems that need to be overthrown and replaced. But the rest of us are all screwing it up, all the time, through our greed, our denial, our apathy, our refusal to listen to him banging on about his tired socialist ideology.
For the Christian, the ideal end state is safely in the next world and therefore is never in doubt. For the individualist, it’s in his own life, and it’s mostly under his direct control. For the leftist, however, it is all outside his control. It requires other people, a lot of other people, and those SOBs usually refuse to cooperate. Talk about rage-inducing.
If the whole focus of your life is on getting everybody else to agree with you on every detail of your politics and adopt your plans for a perfect society, then you’re setting yourself up to be at war with most of the human race most of the time.
Which means an awful lot for the Angry Left to get angry about.