Petaah, why does he mean when he says he's afraid?

I don’t get it.

Petah. I don't get the joke and I feel racist.

What does this mean?

What did the Spetsnaz do?

Apparently this is loss but I don't see it. The OP said I had to think outside the box. Some people found it but I still can't. Any help?

Wait,aren't they brownies??

Petah?

Help me petah

Wtf?

Another joke I don't get. What do math problems have to do with this?

???????