None of us do!
The Lord didn't choose to record the details of His displeasure with it.
We can only guess, surmiss, wonder, ponder, meditate on and/or postulate about it.
The Lord didn’t choose to record the details of His displeasure with it.
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A preacher once told me that God required a blood sacrifice from the very beginning. That God Himself slew the first animal (Biblically verifiable) and that Cain could have traded some of his crop to Able in exchange for animals to be sacrificed.
Of course, this was only his opinion but it’s as good as any I’ve heard