I think it pretty much doesn't matter if the dossier is false at this point.  If it proves to be fabricated, then this is just the same kind of garbage the Republicans pulled on Obama for 8 years,  think of it as payback for 8 long years of lies and fabrications about Obama.  If it proves to be true or even partially true enough to kick off the investigations, then so be it.  Either way, no problem with it.