There's no excuse to what the Japanese did under military rule, either. And the Japanese killed in the tens of millions.
In regards to the "start date" of WWII, Europe had been a powder keg waiting to go off and the Balkan war in 1912 almost triggered it, but the assination of Archduke Ferdinand two years later lit the fuse.
BUT the events leading up to WWI, reach back roughly a thousand years, when the Roman Empire fell, creating a territorial control vacuum that festered through the ages and came to a head in 1914 and was not resolved in 1918/1919 and actually made things worse when some nations were dissolved and others created.
So NO, WWII was not the result of WWI, it was a continuation of a condition that reached back millinea.
I understand that if one has an idea in their head about how things should be, it's often times difficult to show a different perspective, but this forum is about military history anf I have been studying it for half a century...so like I mentioned earlier, I'm not talking out my ass when I'm putting out a timeline on how things came about.
I am guilty of condensing things oftentimes, because I don't like writing 10,000 word dissertations