watch out! robber!

last night, there was a robbery in a shop at Rawang. about 5 or 6 blocks from my house.
I knew it form my family.
in the morning, people in my house were talking about that robbery.
my bro : there was a robbery in that X shop.
mom : what did the robber take?
my bro : ciggaretes. but only a few.
my neighbor : he must be a stupid robber!
dad : why?
my neighbor : he only stole a few cigarettes, and those are the cheapest one. and u know, he only steal cigaretes. stupid! there are many kinds of expensive things in that shop but he only steal the cheapest one. why don't he steal as many as he can?! ( my neighbor looks angry with the 'stupidness' of the robber )
dad : ( nod his hand ) a ha. ur rite. he should bring a big sack. hahhaha
 I am confused with this conversation.
what are they talking about? are they going to support this robber?. hahha.
well, robber! don't visit my house!