Those boats know what they did. I presume scraped some of their pod with propeller or something, they are revenging themselves.

IIRC the current theory is that it’s a game juvenile males started playing for fun.

Also, sailboats and orcas are not like powerboats and manatees. The notion that the boats somehow injured the orcas is not plausible for several reasons:

• A 40 foot sailboat tops out at about 10 mph, while orcas can swim over 3x that speed.
• Sailboat props are often directly behind the hull and surrounded by rudder, rather than protruding below it where it could hit an animal swimming below the boat.