I wanted to expand on @o-wild-west-wind post (read it here!) but felt like it was too long to just add on.
Ed and strangulation of/after father-figures threatening him
The first two times we see Ed actually evoking physical violence on someone in S1 it's no coincidence it's to his father (-like figures) that are actively threatening him and his loved ones.
And then when we see him strangle someone else, it's a British officer (and this is again right after another father-like figure, Pop-Pop, brings up all of Ed's father issues) and when Ed disassociates at seeing the blown up ships and possibly Stede and his family dead. It is also framed the same as when Ed kills his father, he is behind the officer and using another item as the catalyst.
It is also interesting how he "escalates" the violence. First, he uses the British officers own catalyst for violence against him — the musket. A perfect nod to what Stede does with Ned, using his instrument of torture, the violin, as a means to his death).
Ed then uses his own hand to kill the officers that are reading his love letter from Stede. One of Ed's hands holds love and acceptance and the other provokes violence that is only used to protect said love and acceptance.
The other violence evoked in S1 (and S2 - not including shooting the already dying man in ep1) is to Izzy: the toe cutting. Mentioned first by Calico Jack as "fun" about Hornigold, the violent father-figure who trained Blackbeard in how to be a pirate and a pirate captain.
Next, we have Ed in the gravy basket, and the multiple increasingly funny ways of killing Hornighost. But that first one is, you guessed it, strangulation. Right after Hornighost brings up Ed's deepest secret, strangling his own father. But unlike with his father, Ed is facing Hornigold.
Ed's violence on this show is very specific and calculated. That's because Ed is not a violent person at his core. He is forced into violence to protect himself and his loved ones. He only provokes violence on the older white, father-figures after being threatened. His motivation is the same, protection, but the target expands from personal father-figures to the whole industry of the British officers/white colonization.
At the end of S2, Ed learns to embrace all sides of himself, the Kraken, Blackbeard, Ed. The soft and loving, and the having to use violence to protect for love that he has tried to separate like a different identity. Instead he learns to embrace all of it, all of himself. All for love and acceptance, both from others and himself.