From Christians during Lent, to Jews during Yom Kippur, and Hindus on several occasions, fasting is a shared phenomena between all major faiths. By inviting people of other faiths to partake in fasting and other Ramadan activities, Muslims can strengthen bonds among people of faith.
Ramadan is also a month when charity is highly recommended. The charitable projects do not just target Muslims and tend to bring relief to all mankind. Muslims can use this month therefore to share love and build genuine bridges. Ramadan is also a time of social connections.
Muslims gather for breaking their fasts and during other activities. It is a time for connecting with the communities. Muslims can truly connect at this time with all the different communities of different faiths by inviting others to the noble activities of Ramadan.
Spirituality in Islam involves connecting to God, but also connecting and caring for His creatures. The true value for Muslims thus in this month is involving people of all faiths to create this connection.