Now, that excerpt does not help you in any way.
That's reiteration of a standart Islamic concept. If you believe Qur'an bans alcohol but take it, you are a sinner but still Muslim. If you refuse that Qur'an bans alcohol, or claim that such bans are irrelevant then you are not only a sinner but also unbeliever. You cannot chose parts of Islam to believe.
How do you call the muslims in paradise, swimming in rivers of wine?
hypocrits?