I don't think it is a sin to drink something like a Glenfiddich 12, Jameson 12, Canadian Rye or Redbreast 12 with ice, but not a nice single malt like Lagavulin 16.
So... your guest wants to try a "Single Malt Scotch" and asks if he could have a bit of the Lagavulin 16 that he has read about, but he wants ice?
"It really doesn't go well with ice, but I have some Glenfiddich 12 if you want, or maybe some Crown Royal or Alberta Premium Rye instead? Ok you want to be adventurous, but with ice, so I can sacrifice some Redbreast 12 irish or Cock of the North (whatever it is) for you. Sure you can have some Lagavulin, but you couldn't ask me to insult the good people of Islay who fought and died for Robert the Bruce at Bannockburn in 1314 by putting ice in it"
Enjoy!

