Seems unlikely. Complete ideological conflict. That text doesn't say ISIS should be supported, it says ISIS is a cancer that isn't going away. ("We are now living with cancer. Time to accept it.")
What I'm taking away from that is that Taaki sees ISIS as proof the western powers can't deal with that type of non-state threat. I'm not sure whether he sees that as encouraging from an anarchist's point of view or whether he's saying it's on the public to renew Western civilization so it can survive.
What I'm definitely not seeing is a call to arms for ISIS.