Orcas are the the most geographically diverse animal (after humans) on the planet. They are found in literally every ocean and off the coast of every country.
Which begs the question, why do the BBC and others make themselves suffer by only filming them in places where its freezing cold? Surely you'd much sooner sit off somewhere with a nice rum and film them?
As for the attacks I suspect its a convenient training tool for the youngsters rather than any kind of revenge mission. They only attack sailing boat rudders, a relatively large protrusion not moving too fast and holding a fairly steady course. I'd guess it helps the kids learn about closing speeds and angles of attack etc. As soon as the rudders break off they generally bugger off right away.
So far, it's only this one pod around the straights of Gibraltar and up the coast of Portugal that's exhibiting this behaviour which rules out climate change driving them potty.
There's a couple of pods living off the coast of the UAE. One that roams between Abu Dhabi and Qatar, and another that works the coast between Dubai and the Straights of Hormuz. I have seen the latter pod from time to time, and caught a video of 3 of them (a mother and two calves) a few years back when I was heading out fishing with a few locals in their traditional chugger.
Adrenaline pumping stuff. Incredible.