Political Persecutions forced Seyyid Said to move his capital to Zanzibar from Muscat. Oman had become insecure for him to live and carry on with administration. - The religious persecutions in Saudi Arabia also forced him to leave Oman and settle at the coast of East Africa which was free from such acts.
By opening more opportunity to business trades, more culture into the country, and causing a new opening to allowing Chinese currency at some businesses. Hope this helped!
Thanks!
~Steve
Liberty I think, makes more sense