It's wrong to start fights over trivial matters.
Gabe is talking to his friend who made a point which he feels certain is incorrect.
Gabe wants to feel validated that he is correct.
Gabe emphasizes that it doesn't really matter but sends his friend a link proving him right.
Gabe gets into a fight with his friend and proves his point to her.
Gabe's friend is able to shrug it off and agree with him.
Gabe's friend is put off because it wasn't that important to them to begin with.