Ukraine is a country situated in europe, so also, Russia. Hence, their closeness and relatedness. However, the downplaying of the Russian threat by President Zelensky is as a result of the support gotten from other countries of the world.
The non-interventionism of the world
Non-interventionism is a political philosophy or national foreign policy doctrine that opposes interference in the domestic politics and affairs of other countries but, in contrast to isolationism, is not necessarily opposed to international commitments in general. This makes the Ukrainian President to hope that there shouldn't be any course for alarm couples with the support from other world powers.
Therefore, the reason for downplaying the threat is as a result of the support and the Non-interventionism policy.
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