Why does russia say kolkolkol in Hetalia?

Most think it's to indimidate others into submission.

HOWEVER

There are a LOT of plausible reasons for why:

Reason #1: Tsar Ivan the Terrible's favorite method for dealing with disobedience was impalement,and сажать на кол (sazhat' na kol),means 'to impale',or на кол 'na kol' is also easily understood as the same thing.Russia is possibly threatening to impale someone when he goes kolkolkolkol

Reason #2:кол means stake and in the context of this reason,in the act of thrusting it towards someone.

Reason #3:He is possibly issuing a warning,because колoкол means bell,and кол is an onomatopoeia for the tolling of a bell,which is a old sign of approaching danger.

Reason #5:"korukorukoru",as it is pronounced in Japanese,is similar to the Word "korosu",the Japanese Word that refers to killing.

Reason #6:The Russian Word 'Kolkhoz',which was the collective farming of the people during the Soviet Union.This is a reason because the 'Kolkhozy' went terribly.Stalin forced everyone to become collective farmers,meaning they would all make the same income.Many people were not happy about this.