Andreas Lubitz was probably a Muslim convert who had been recruited by the CIA to carry out a false-flag operation intended to implicate Vladimir Putin.
Either that or he was simply mentally disturbed. We do know that his initial pilot training was interrupted for as of now undisclosed medical reasons. Worst case is that Germanwings faces a lawsuit because they let a former psychiatric patient fly a plane or something like that.
Joking or not, Putin is the only person who would suggest something like that.