Knowing the truth, as Jesus said, is liberating, exciting, and joyful. Jesus, however, was passionate about people, too, and in him the passion for truth was infused with love for the people he encountered. God is truth but he is also love, or, we might say, genuine and full truth is always rich in love. The zealot truncates the truth, minimizing or stripping away the element of love, leaving behind only assertions and reason and perhaps little of it. Truth becomes something to be debated and people who hold different views become enemies whose arguments must be hamstrung and smashed.
Communication therefore becomes adversarial and combative rather than relational.
Instead of a thing of beauty to be desired truth is presented as a sword that destroys. Overall, there is a drift in goals away from witnessing to truth toward destroying opposition to truth, even at the cost of wounding or killing people with contrary views. Arrogance drives out humility. There is no allowance for the need to grow in understanding of truth in all its dimensions, subtleties, and application to specific situations. Unfortunately these limitations are neither recognized nor acknowledged when pointed out.