Ofgortens, little diff between bb-pew2 this age, and pyro-CR last age, is that last age pyro didnt contact about a deal untill meter was almost maxed. At that point they had 3 options left. war, deal, intra raze to deny us acres. They chose to deal.
In this case, pew2 knew they had 0 chance to keep the cows. Doubt they thought they had any chance to keep the cows through diplo, and they chose to intra raze them.
Intra razing to deny BB the acres could be seen as a questionable tactic. But the alternative is a complete farmout which has been deemed unethical in past ages aswell. So kinda stuck between a rock and a hard place?