The Yasukuni Shrine was established in 1869 in Tokyo, Japan. Its primary purpose was to honor and commemorate the spirits of Japanese individuals who died in service to the nation, specifically those who fought and died in wars during the Meiji Restoration and subsequent conflicts, including World War II. It wasn't built for WWII to celebrate war crimes.
There is a strong tradition of honoring the dead through funeral rites and enshrinement, regardless of how good or bad the person's actions might have been in life. Japanese funeral customs are rooted in a mix of religious beliefs, including Shinto and Buddhism, as well as cultural practices that emphasize respect for the deceased and maintaining harmony with the spirits.
There have been instances where individuals who did not die in battle or in direct service to the war effort were enshrined at Yasukuni Shrine.
"The shrine lists the names, origins, birthdates, and places of death of 2,466,532 people.[2] Among those are 1,068 convicted war criminals, 14 of whom are A-Class (convicted of having been involved in the planning, preparation, initiation, or waging of the war)."
https://en.m.wikipedia.org/wiki/Yasukuni_Shrine
That depends on the politician and their role within the military. So they can be. I would assume that if the government is military, that you'd be largely incorrect.
Saying Japanese people deserved to be bombed blames even the lowest of peasants.
Are you okay with the prospect of becoming fodder for a war that you don't believe in?