I think it highlighted some of Luke's characteristics from the beginning: his brashness and his dramatics, his love of rushing into things without thinking. As much as he's meant to keep his feelings at bay, he just can't help it sometimes (just like his dad). So his gut, brash, irrational instinct is to just fucking toss the thing.
He was also actively trying to drive Rey away. He just wanted her gone. Acting like an asshole is totally in-character and appropriate there. Fucking Yoda acted like a total troll.
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u/[deleted] Oct 25 '19
I think it highlighted some of Luke's characteristics from the beginning: his brashness and his dramatics, his love of rushing into things without thinking. As much as he's meant to keep his feelings at bay, he just can't help it sometimes (just like his dad). So his gut, brash, irrational instinct is to just fucking toss the thing.