Of the 99.9999% of people on these two planets, they wouldn't have the chance to meet in their lifetime, let alone know about anything happening on the other planet. Even if the other planet exploded, they would probably find out about it after a week or half a month.
Then they would sigh and start forgetting about that planet.
When the distance becomes so great, there is no concept of it.
Even many people in Eagle Beak City spontaneously signed a declaration of war and forwarded it to their social circle!
"Declaration of war!"
"To Carl Jacob Company--"
"Grandson, your grandfathers are waiting for you in Eagle Beak City on Shell Silver Star, don't you dare not come."
"Remember, there is no excuse; your grandfathers are waiting for you in Eagle Beak City. If you are afraid, just squeak. It's best to let us witness the bombardment method spanning 7000 light-years, right?"
"Talking every day, can you come up with something real?"