Final answer:
The quote in question was said by Mawlana Hazar Imam, Prince Karim Aga Khan IV, during the Golden Jubilee, marking 50 years of his leadership as the Imam of the Nizari Ismailis.
Step-by-step explanation:
The phrase "Yes! We are a community that welcomes the smile" was said by Mawlana Hazar Imam during the Golden Jubilee celebrations. The Golden Jubilee marked 50 years of his leadership as the Imam of the Nizari Ismailis, a community within Shia Islam. Mawlana Hazar Imam is a title used by the Nizari Ismailis for their spiritual leader, and it is a title that has been held by the current Imam, Prince Karim Aga Khan IV, since 1957.