Perfect sense

Two things France wanted to do:

1. shut the borders to refugees; and
2. join the war against the Syrian government.

"Paris attack may be false flag operation: Analyst"

"Another Paris False Flag Attack?"

"A warning about the Paris terror attacks"

You can see immediately why ISIS would want to put a bomb in a Russian plane. Russia is at war with ISIS.  What possible motive could ISIS have to open up a new front now involving France?  Aren't they busy enough?  On the other hand, if ISIS is just an intelligence tool of the Zio-American Empire, giving the French a reason to pretend to increase the fight against ISIS as a cover for an operation against the Syrian government, while simultaneously increasing Islamophobia and anti-refugee sentiment in Europe . . . well, everything suddenly makes perfect sense!