We need to pray against deception every day. The Bible declares that Satan deceives the whole world. The enemies job description is to steal, kill and destroy (John 10:10); and he tries to fulfil his task by any means he can. He does not play fair.

“But I fear, lest somehow, as the serpent deceived Eve by his craftiness, so your minds may be corrupted from the simplicity that is in Christ.  For if he who comes preaches another Jesus whom we have not preached, or if you receive a different spirit which you have not received, or a different gospel which you have not accepted—you may well put up with it!” 2 Cor 11:3-4

The Bible warns us that Satan will disguise himself as an angel of light. (2 Cor 11:14)