Relationship between South Korea and North Korea

Actually Whenever I talk about these two countries, I felt feel tight in my chest.

Since because we, S. Korea, are supposed to be one country with N. Korea. We have been separated into two countries since 1950, and since then we have changed a lot from each other from including languages to and ideologies. As time goes by, the differences between us is are

getting bigger and bigger.

These days I heard that N. Korea is preparing for war to against the U.S.A and S. Korea.

I don't really understand them. We have helped N. Korea over the past several decades.

But N. Korea is still (you would use still if you had mentioned N. Korea being poor earlier in your paper) one of the poorest countries in the world and there are many hungry people.

In this situation should we keep giving a helping hand to them?

Or although many N. Koreans has have died with from being poor and hungry, should we stop giving a helping hand?

I think you already finished this a while ago, but I saw it wasn't corrected and I thought I would correct it just in case. ^_^