Stephen Gethins, North East Fife MP, posted the jokey tweet in reaction to debate around Richard Leonard’s loyalty to England.
The new Scottish Labour leader caused a stir when he admitted that he’d still be supporting England if the two countries met during his leadership reign.
Gethins tweeted: “Whether or not you back the Custom Union matters to jobs, the economy and people’s daily lives.
“The football team you support does not. I know some fine @dundeefconline fans who back the EU even though @dundeeunitedfc fans have more experience of Europe.”