Complex sentence: In this way, antireligionism goes beyond the spectrum of atheism and even anti-theism, which contends with the existence of a deity; it stretches its reach to reject and oppose all other religions, such as nontheistic Buddhism and Confucianism.
Split into simpler sentences: In this way, antireligionism goes beyond the spectrum of atheism and even anti-theism, both of which contends with the existence of a deity. Antireligionism stretches its reach to reject and oppose all other religions, such as nontheistic Buddhism and Confucianism.