This is only your misconception that Pakistanis are very serious about cricket and non-serious about Islam.
Pakistanis are very good sportsmen. They take cricket as a sports only. They don't bring cricket into Islam. They never talk about cricket during a prayer. They don't destroy anything in the name of cricket too. On the other hand they're very serious about Islam. They bring Islam into everything including cricket. They pray or do sajda even in the cricket ground during the game. They can destroy anything in the name of Islam, even themselves. You had no other people more serious about Islam than Pakistanis. Remember? when Babri mosque was attacked by Hindus in India, Pakistanis destroyed their own public properties in Pakistan as a protest. In contrast, governments of Muslim countries deported those Pakistanis who tried to show their grief on the incident of Babri mosque in middle east countries.