You don't seem to understand that the wave keeps going until it strikes land where the energy is dissipated. There was a report from an old Spanish mission in California that a wave deposited a boat near the mission that was on a hill high above the ocean. There is evidence that a landslide occurred in Hawaii at the correct timeline to have pushed a wave to California. That's 2500 miles. There is evidence along the west coast that there have been many large waves that came ashore in the past. A rise in the water level of 10 feet could be disaster for Florida, especially the Southern part that isn't very high above sea level. La Palma is 3700 miles from Florida but a look at the geography indicates the wave would be directed to the East coast of the US.
Most of Florida is well below 50 feet in elevation.
Here is a chart I found of the highest waves.
The largest waves were higher because they were in confined spaces.
Still, the death toll from earthquakes and tsunami will be but a pittance compared to the devastation of a Supervolcano that would endanger the lives of almost every human on Earth.
Even with the widespread death toll of the 2004 Tsunami, the 1976 Earthquake in Tangshan China killed more people when at least 242,000 died and some claim it could be three times that many.
