Ruling on offering Du`a' for someone who built a Masjid at his own expense?

Q: Making Du`a' regularly for the person who built the Masjid is a Bid`ah (heresy in Islam) that has no basis in Shari`ah (Islamic law). Neither the Sahabah (Companions of the Prophet Muhammad) nor the Salaf (righteous predecessors) publicized the good deeds of others. Allah did not ask us to worship Him in this ostentatious and excessive pride nor display good deeds. There is no harm if the Khatib (preacher) exhorts the people to build Masjids and perform other pious acts and explains the reward for this meritorious act for them, and to encourage Muslims to offer Du`a' for others in their absence for their good deeds.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.