Inviting the US military lieutenant colonel to be the Ukrainian defense chief, why did Ukrainian officials make such a "joke"?

This is because they had a good talk and had a good time when discussing the Minister of National Defense, so they just made a joke. At the same time, it is also because the US military lieutenant colonel who is so valued by Ukrainian officials is a Ukrainian-American, and he can speak fluent Ukrainian, which of course makes the official very happy. The more they talked, the happier they got, and they got this joke.

The name of the US military lieutenant colonel is Wyndman. He was an expert on Ukraine at the National Security Council. He also appeared at Trump's impeachment hearing. It can be said that he also has a certain position among many American officials. He also publicly stated at this hearing that he quickly rejected this proposal. It was just a joke at that time, and neither of them took it seriously.

Because the problem between the United States and Ukraine is very delicate now, if this American lieutenant colonel has a secret deal with Ukraine, it will definitely have a bad influence and will be caught by political opponents. This is why he has repeatedly rejected these proposals and even reported the situation to the National Security Council in time. Of course, he didn't forget to mention that it was just a joke.

Daniliuk, an official, has made great contributions to the relations between the United States and Ukraine. He has a good relationship with his former security adviser, which is also to let Ukraine get some benefits from the United States, such as military assistance. According to the information we have at present, both Wyndman and his twin brothers were born in Ukraine, so they also have deep feelings with Ukraine.