The Scotsman is wrong to use imagery like this to attack the present-day SNP. As well as being divisive, it cheapens the victims of the Nazis during WWII.
SNP supporters and members should, however, take note of the SNP's official stance during the war, which was to not support the British war effort, and actively encourage Scottish workers to avoid conscription in munitions factories.
I'm not aware of the SNP ever apologising for these actions - if they have then I stand corrected. Someone linked to the Wiki page for ex-SNP leader Arthur Donaldson earlier. Those archives at Kew Gardens make interesting (disturbing) reading.