I must point out that democracy and Islam are two VERY different things. Democracy as a system of ruling is not Islamic in its Origin.
Democracy is a system of ruling whereby man is sovereign in legislating laws and systems.
Britain and America are democracies. We as Muslims should hate this system with our hearts Democracy as it contradicts our aqeedah as it is part of the capitalist ideology. This brother is a Kufr system and we should not aspire to it as it is man made and not prescribed for us either in the Qur'an or the Sunnah . Hence a ruler is not sinful for not adopting shura . But what is fard on the Muslims is the system of Khilafah .