Israel Folau will front a code of conduct hearing in Sydney on Saturday after being charged by Rugby Australia's Integrity Unit last month for posting on Instagram that gay people and others he considered "sinners" were destined for "hell" if they did not "repent".
Mapusua said Folau has the right to express his religious faith but it should never to be the detriment of another human being.
"There's always been players of different ethnicities, beliefs, religions and the common thing has always been being able to come together and that was through rugby," he said.