Things that Americans don't know?

Other things Americans don't know = The difference between Austria and Australia.

Bulgaria actually petitioned Moscow to be able to join the USSR back in the 1960s and was denied.

You are only correct on points 1 and 2. Bulgaria and Belarus are two different countries. Bulgaria was not a part of the former USSR. However, it was under Soviet influence was was a puppet state of the Soviet regime. Indeed, it was considered one of the most loyal states to the USSR.

You conflate two separate things in your third point. Very few languages in the world have an alphabet that is unique to it. You can equally accuse English of stealing its alphabet from Latin. A sensible person would not. It is simply a puerile claim.

The Bulgarians were most definitely not the first Slavs. Indeed, they are not pure Slavs unlike the Russians. Bulgarians are of mixed origin.

I thought Bulgaria and Belarus merged and formed Belgium.

Well alright then .

I knew that. I loved Bulgaria, no blacks around.