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Here's them working with iceApplying Occam’s Razor to this behaviour… we know that orcas which prey on seals will sometimes act as a group to overturn an ice floe with a seal on it.
Compared to the moroccan video its not the same behavior. They don't make any attempt to flood or tip the boat like this. Here's some more video. Its a consistent method by the look of it.
Possibly they just haven't worked out a good method for boats yet but they don't seem to be trying hard to smash hulls. The fishing boat didn't look like it was more than brushed against, not a very sturdy built hull.