[2:99-100] And We have revealed to you clear proofs; and none disbelieves in them except the wicked. * Why, whenever they make a covenant, does a party of them reject it? Nay, but most of them are disbelievers.
One disbelieves in His clear signs only when one's eyes are blocked from perceiving and one's fate from God has already been determined as unfortunate. There is no sense in anyone who denies that day is day. Likewise, there is no union for anyone who has not been assisted by lights and insights from the Real.
Why, whenever they made a covenant...: their predetermined fate (sābiq al-taqdīr) was confounding them and their subsequent contriving (lāḥiq al-tadbīr) was breaking their covenant. God prevails over His affair.