Organized religion baffled her, made her vaguely uncomfortable. Each had followers who were so sure they were right, that their way was the only way. And throughout history they'd fought wars and shed oceans of blood to prove it.
The protagonist expresses a deep discomfort with organized religion, noting how it creates an unsettling division among its followers. Each group is convinced of their own correctness, often to the exclusion of others. This certainty leads to a history filled with conflict and violence, as believers have fought to defend their beliefs passionately.
This observation highlights the dangers of dogmatism within organized faiths. The protagonist's unease suggests a longing for understanding and acceptance, indicating that such rigid convictions can lead to devastating consequences rather than unity and peace.