False Flags, Fact or Myth

Why is America training and arming what they call, moderate Muslims in Syria, Libya, Iraq, Yeman, and send them 100's of millions of dollars in support and what do they do....They join ISIS, and they do it with US arms, Training, and millions in supporting funds. None of this makes sense. Are they preparing us for a false flag that they can blame on ISIS ? and lets look at the history of False flags.