Czech please stop it

I just heard, or more correctly, overheard, this conversation in Panera:

Old guy talking to young Panera girl, dressed in her pastel uniform. Conversation is in full gear by the time I’m earshot.
OG: Where are your parents from?
PG: Czech Republic
OG: Oh, do you know what a Czechoslovakian abortion is?
PG: No.
OG: Canceled Czech.

Now there are a few things wrong here.
First of all, it seems majorly inappropriate to tell that joke to someone you don’t know.
Secondly, for an octogenarian to tell the joke to a twenty something while she works feels awkward too.
Thirdly, the poor girl didn’t get it.

PG: I don’t get it.
OG tells it again, with no further explanation, as if that would clear it up. It doesn’t it.
OG: You know like at the bank when they cancel a check? It’s the Czech getting canceled.
PG: I understand, I just don’t know what Slovakia has to do with it.
The old guy doesn’t realize Czechoslovakia is not two separate states. Czech Republic and Slovakia. His memory bank of jokes doesn’t up date with the political climate.
I’d like to think the girl got the joke but sensibility prevented her from laughing and ‘please the customer’ attitude prevented her from expressing her outrage, so she expressed it by calling the guy on his knowledge of life outside the United States.
I’m assuming he should be updated on life in the US, too.

prologue
As I sat down to enjoy my drink and the free wi-fi that allowed me to post this so quickly, the old guy gravitated to the booth directly in front of mine. (behind mine, if you’re my bookbag.)
He greets the woman there, and before she can introduce him to her man friend, the Old Guy breaks out another joke.

OG: A man goes into a grocery store and asks the kid if he can get half a head of cabbage, the kid says he doesn’t know, he’ll have to ask someone else about that. So the kid walks into the back, and unknown to him the man follows. The kid reaches his manager and says, ‘some asshole out there wants to buy half a head of cabbage.’ The manager sees the gentle man standing behind the kid and says in a stern voice, do you mean this gentleman? The kid turns around makes eye contact with the man and says, no, this is the nice gentleman who wants to buy the other half.
After the customer leaves, the manager remarks how quick that thinking was, so quick he wants to make the kid a manager at his Detroit store. The kid says, Detroit? The only thing in Detroit is hockey players and whores. The manager says, my mother lives in Detroit, to which the kid replies, oh yeah, what team does she play on.

Now there are a few things wrong with this. It presupposed Detroit hockey players are not whores. Second, it’s an awful long joke to tell to someone who is waiting patiently to eat their soup, or who is trying to write fast enough not to forget the Czech incident that just happened. And it’s not that funny.
I bet that guy would be a pain in the ass to work with or be related to.
And lastly, I’ll be telling that at the next gathering, as a follow up to this:
You know what they call a canceled check in the Czech Republic?
An abortion.

Peace
Larry