Although I doubt that Signal would leave the EU (or that this dangerous regulation would even become something that could ever be applied in practice), SimpleX looks very promising as a possible alternative.
However, it would also mean that you have to convince all your contacts to make the move, too - which was already difficult when I told them to install Signal additionally to WhatsApp, which is virtually on almost every device.
Which continent would central american countries then belong to?
To answer OP's question, I'd say that US citizens are being referred to as "Americans", because the name of the country is "United States of America". Every other country on the north or south American continent has its own distinguished name, which can be used to refer to its citizens, e.g. "Canadians" or "Mexicans" etc.
Pretty good summary, but I would object, that "Hamas" is something like a "government" in Gaza. It's a terrorist group that took control of the Gaza territory and it's people without ever having been elected by someone (in fact, they are suppressing any kind of election since they took over the power from the Palestinian authorities). They are also using the Gaza population as "living shields" against counter strikes to their terror attacks. Nowadays they also have international hostages, which would make a counter-offensive even more difficult.
A possible - although very unlikely - solution to the conflict could be a de-radicaiisation on both sides and the Palestinians finally overthrowing the Hamas-regime and any other terrorist groups, because those are not fighting for Palestinian freedom, but for some crappy "Jihad" ideas and the destruction of Israel.
Having said that, the Palestine territory was not chosen arbitrarily, but probably because of the significance Jerusalem has to the Jews, where their ancient kingdom and temple had been.
“I don’t care about the truth! I have my own truth!“