You have no clue if you think fsa is isis and vice versa. Turkey, just like Britain and some other western countries, started supporting fsa in the beginning. Then isis showed up this year in syria as well. They fought each other too. Essentially isis made our fsa project worse. Then Isis harmed Turkey on several occassions too, yet some westerners are telling us that Turkey supports isis
If anything, the west, with the US on the lead, is mainly responisble, but we see how they are evading their responsibility and tries to push Turkey and others to the front. No one is gonna fall for such games, except for the sheeple in the west.