>While we probably should have done a vote:

An election wasn't needed. The Koreans already organized into a popular and sustaining government following Japanese surrender, the PRK. The USMGIK was explicitly tasked with eradicating it in the south, and formally outlawed it in December 1945. Some portions of it remained behind, especially on Jeju Island. These groups ended up protesting the 1948 sham election of Syngman Rhee, who responded with a self declared eradication campaign on the island, resulting in upwards of 100,000 civilians killed, injured or displaced.

In the North, the PRK remained in place and supported by the USSR until the 1948 election of Kim Il Sung, whereby the DPRK was proclaimed and the PRK committees were rolled into the Worker's Party of Korea.

>the USSR which controlled the North would have done a sham vote

There's no evidence of this, quite the contrary. The 1948 assembly elections in the South faced incredibly restrictive voter eligibility requirements. Only landowners were allowed to vote in populous areas, and single elder representatives voted on behalf of entire villages. The election was married by suppression and corruption. There's simply no evidence of corruption in the 1948 northern elections, which were open not just to North Koreans, but South Koreans as well

>A bad border does not justify invasion

Not a bad border, a partition imposed upon a people and maintained by a brutal dictator, his Japanese and sympathizing administrators, and the global imperial hegemon. Following the announcement of separate elections in early 1948, South Korea was already in an open state of civil war, with guerrillas fighting directly against ROK and occupying USMGIK troops. Large scale border clashes had already been commonplace by 1949, with South Korean troops making significant incursions across the border well before the Korean invasion of Korea. In the immediate runup to the invasion, South Korean forces had been stationed at Ogjin, which became one of the opening battles during the invasion. They had also captured Haeju, some 20 miles north of the 38th parallel

The war did not begin in 1950, it began prior even to 1948. The Korean invasion of Korea was simply an escalation in an existing civil war against an occupying force and it's collaborators, not unlike the American Revolution. Hell, the US didn't even care about the South Koreans. It deliberately bombed refugees fleeing from the violence during the 1950 offensive at Nogeun-ri. Some 400 South Korean refugees, nearly all women and children, were bombed and shot deliberately. The incident was covered up until 2001. And a South Korean commission found in 2008 evidence of nearly 200 other similar attacks on refugees by the US military

>What authority? Military occupation authority?

So Japan was justified in exporting Korean women as sex slaves because they occupied the peninsula? If your analysis begins and ends at might makes right, I really don't know what to tell you.

> Soviet even directly rejected UN's proposal.

Why?

>There's nothing can be done at the moment.

The US did not have to occupy korea. They did not have to outlaw the PRK. They did not have to install Rhee, who would go on to block reunification. They did not have to commit war crimes at Jeju. They did not have to air strike refugees at Nogeun-ri

>Talk about dictator, you know Kim Il-sung a dictator too,right?

Not particularly, no. The DPRK largely absorbed the PRK in the North, and there isn't much of any evidence to show that the election of Kim faced faced significant malfeasance. The same can't be said for Rhee. The 1948 South Korean Assembly election can hardly even be called such, considering how voting was held in the same manner as under Japanese colonial administration, where only landowners in populous areas could vote, and where single elders voted for entire villages.

>Millions of death or exile cause he want to "unify" Korea by war

Why did Kim want to unify Korea? Because the partition of the peninsula was facially illegitimate. Koreans clearly did not want it, seeing how they never voted to partition.

>He wants to be another Mao as he won the Chinese civil war. Do you know he purged the leadership of southern communist after PLA retake Pyongyang for him? And then he purged pro-soviet and pro-sino members to make his Kim dynasty.He called them spy from the south lul.

Narrativizing isn't going to get you anywhere. The USMGIK banned labor organization and the PRK. Rhee eradicated an entire island of opposition

>Both dictator was shit,but guess what? South nowaday is better than north thousands time.

Surely that has nothing to do with South Korea receiving the equivalent in US funding of several Marshal Plans, while the North received more bombs than the entirety of Europe during the second world war. What's the union situation in the South today?

Leaving the peninsula to its own devices and governance surely would have led to significantly better outcomes for both halves. The North wouldn't have been bombed to rubble and the south would have stumbled upon an at-least-vaguely stable leader far sooner than it has

>Even if US want to consult with PRK, do you think PRK wouldn't listen to Soviet?

Did the PRK have some supremely endowed obligation to not listen to the soviets? Considering the structure of the PRK, it almost surely would have aligned with the USSR, hence why the US spent so much time and effort installing a dictator in the south, smashing popular dissent in the south, and aiding and abetting in it's atrocities