He probably thought it was another one of the many "**** off you French bastard" letters and cards he was sent and chucked it straight away in the waste bin.
Always feel that there is a lot more respect for fans in the non-league. At Winchester, there have been numerous "one minute" silences to mark the passing of fans and the atrocity in Paris plus the Shoreham airshow disaster where a couple of footballer were killed were also commemorated respectfully.