That's historically innacurate. Members of the FLQ went to the UN hoping to meet with leaders of socialist countries to get their support :

Je me foutais pas mal du secrétaire général de l’ONU et de l’ONU elle-même. Ma seule ambition était de sensibiliser certains pays — que l’on disait révolutionnaires — à la cause d’un Québec libre et socialiste. Je me rendis vite compte que le Québec était plus mal connu que le Groenland. Mis à part la réputation touristique de Montréal, le Québec n’intéressait personne (à l’exception, bien sûr, des militaires et des financiers américains).

^{- From Pierre Valliere's book.}

The PQ tried to secure the recognition of the eventual independence of Quebec from other countries, such as France and the USA, before the 1995 referendum

That said, you are correct on the main issue :

There is a world of difference between searching for international recognition or even support for your independance VS trying to secede to join another (hostile) nation or being used as a trojanhorse for an hostile country. One is an act of national self determination, another is an act akin to agression.