The 'QI' frontman took to social media to issue MPs with a stern warning, advising them that you should always "do what your enemy least wants you to do".
His comments come amid claims from some pundits that further military intervention in the Middle East could be playing into the hands of Isis fighters hoping to receive Syrians radicalised by further bombs raining on their homeland.
Fry appeared to lambast David Cameron's attempt to "destroy" IS militants by calling those who oppose airstrikes in the region as "terrorist sympathisers" - a remark the Prime Minister was widely criticised for.
Of those who claimed responsibility for the recent Paris attacks, Fry said: "Here we are stumbling towards what they MOST want us to do."
There’s only one rule in conflict: do what your enemy LEAST wants you to do. And here we are stumbling towards what they MOST want us to do.— Stephen Fry (@stephenfry) December 1, 2015
He also posted a link to HuffPost Comedy's 'The clear case for bombing Syria', published earlier this week.
Satirical points include: "All previous such interventions - Iraq, Libya - have totally stabalised those countries, rendered them peaceful and reduced radicalisation" and "Bombing ISIL is supported by all right-thinking people such as President Assad".
The case for bombing Syria is suddenly looking clear: pic.twitter.com/aJGoy8iWYG— Stephen Fry (@stephenfry) December 1, 2015
A vote on whether to bomb IS in Syria, scheduled to take place after a hefty 10.5 hour debate session on Wednesday, is expected to be close, but only called by the Prime Minister because he expects he can win it.
At least four Conservative MPs have said they will be joining the SNP, Greens and numerous Lib Dems in opposing the government's motion which would extend air strikes currently being employed by RAF fighter jets in Afghanistan to Syria.