Among many results of this psychological phenomenon is my least favorite form of internet argument:
[There is a tradeoff between A and B]
“A!!!”
“How can you say that when B!!”
“But A!! Why do you ignore A?!?”
“That proves you don’t care about B! You are a horrible person!”
“You A denialists are all the same!”
[There is still a tradeoff between A and B]