For the fourth time in two years, a group of unusually brazen orcas in southwestern Europe have sunk a sailing boat after relentlessly attacking it for almost an hour on Halloween.
"These nautical raids were likely started by a pod including White Gladis, a female orca who may have been traumatized by a past boat collision. The unusual behavior then spread among other individuals who seem to be becoming more daring and efficient with their attacks."
If they killed them because their ship was under attack and they feared for their lives after 4 past sinkings and no navy nearby to help, I'm pretty sure people would find it reasonable.
It took 45minutes, that's long enough to get videos, call for help, maybe try to scare them off and then start harpooning them.
You aren't likely going to survive in a lifeboat when they're taking down your yacht.
If it happens even more, they'll he hunted in the region not just immediate self defense. We don't let killer bears just keep killing.