Dhamma makes one dispassionate then how can one be compassionate?

Namo Buddhaya. After practicing Dhamma one becomes dispassionate. However Buddha says one should cultivate and practice Compassion. So am I not killing my own profit of dispassion by compassion? My question is: how can I remain compassionate if Dhamma makes me dispassionate? Or how can I remain dispassionate if Buddha asks me to remain compassionate?