[link|http://europa.eu.int/smartapi/cgi/sga_doc?smartapi!celexapi!prod!CELEXnumdoc&lg=EN&numdoc=31992L0041&model=guichett|92/41/EEC]
It's to protect the cheeldrun:
Whereas, moreover, new tobacco products for oral use which have appeared on the market in certain Member States are particularly attractive to young people and whereas the Member States most exposed to this problem have already placed total bans on these new tobacco products or intend so to do;
The Alander's problem is here:
4. "Tobacco for oral use", for the purposes of Article 8a, means all products for oral use, except those intended to be smoked or chewed, made wholly or partly of tobacco, in powder or particulate form or in any combination of these forms - particularly those presented in sachet portions or porous sachets - or in a form resembling a food product.'
Snus is moist snuff and so doesn't fall under the chewing tobacco exemption.