I think we're way past the "warning" signs with the trump cult (it is, indeed, a full blown cult) but every single item on this list describes his supporters precisely to a T, as is proven multiple times every day.
Feel free to add to the list with any more indisputable truths about the trump cult:
1. The leader is always right (no matter how contradictory it may be to earlier statements the leader has made)
2. Any criticism or questioning of the leader is considered persecution
3. Anything the leader does is justified no matter how harmful it may be
4. The leader is the only source of truth; everybody else is lying
5. Followers must be blindly devoted to the leader and never question him
6. The members will never recognize they are in a cult
7. Evidence, or lack thereof, is of no importance. Only what the leader says is true.