Are you being serious?
Let's assume for a moment, that you aren't being a blatant troll here. With that in mind, here's why it is a smear.
1) The paris terrorists did not use encryption at all--
2) The French government, and the US government already had people warning them about the impending attacks.
3) Snowden's leaks centered around *ILLEGAL* intelligence gathering practices, and his leaks were carefully sanitized and redacted by reporters with journalistic integrity.
4) Unless you think Russia is somehow behind the paris attacks, there is nothing that ties Snowden with said attacks-- and even that is just supposition. (There is shit little Snowden has given Russia besides PR.)
The only connection here is that Snowden drew attention to the US's (and its allies') use of illegal data collection for intelligence purposes, which gave the US a black eye, (and a much needed one at that.) and the administrators behind those illegal data collection practices want to try to assert (falsely) that they could have stopped the paris attack, if it hadn't been for that meddling kid-- Erhm-- Edward Snowden.
This is bullshit-- as again, the terrorists were using unencrypted channels of communication, AND were already known about by intelligence agents/agencies-- who already knew the attack was going to happen.
So, why didn't they stop it? Oh-- yeah-- Because Edward Snowden somehow used whistleblower black magic to somehow make it so they couldnt act on the intelligence they had already collected.... Somehow.
All that said-- Seriously, go troll somewhere else.