So the argument is basically same as saying that the americans committed genocide during vietnam war because of the draft.

It's not at all the same. What US government did to their own citizens and to the countries they invaded is also terrible, but US government can't really genocide US citizens. People in US can have guns and can defend themselves from being kidnapped on a street and put into vans by people in masks. We, Ukrainians, can't really defend ourselves. Our only options are running or knives / pepper sprays. It is not an effective defence mechanism against people with rifles. I am also not aware of people being kidnapped by US government (at least on the scale Zelensky is doing that) during Vietnam war. Nobody prevented people from leaving the country. The terror that Zelensky is doing is in no way comparable to what you're trying to compare it with.

As a European that's what I expect our government to do during an invasion. I would not call that genocide even if I'm sent to die.

Well, you don't value your life or other people's lives. I do.