Arabic is the liturgical language of Islam. The Arabic language is a symbol of Islam and as Muslims, we should be proud of this beautiful language.
Since English is the lingua franca of the world and of most Muslims, and since English is a tool of Westernization and Secularism, we should replace it with a common lingua franca and that would obviously be (Fusha) Arabic. We should try to distance ourselves from Western influence/soft power as much as possible and only adopt from them knowledge that is necessary to advance civilization (military knowledge, scientific research etc).