Before the intriguing "All" idea, and motivated by Atta's 9/11 rebus, I had suggested that perhaps the included items were arranged to form a "911" rebus - just like "two sticks, a dash, and a cake with a stick down". The circular tin and the cigar would form the 9, and I suggested that maybe the detergent box chosen had a prominent 11 on it. Then somebody pointed out that the "All" logo has the double-l that looks like an 11.
It would be of interest to ask someone who saw the detergent box whether it was a box of All and, if so, whether the "a" of "all" was cut out or crossed out. This explanation, although obviously very speculative, explains all the objects in the letter (except the Star of David, which needs no further explanation).
At first I was sceptical about the JLo = MAL letter
but it's beginning to make a certain peculiar sense.