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Christians do not “fear” the mark. They are told to reject it. They reject it out of obedience to God. He said reject it, don't take it, don't accept it INSPITE of the fact that you may need it to to buy, sell, eat. Therefore they watch for it, they are cautious, on guard, warn those who will listen.
This is not a phobia (fear). The secular world may frame it as such like they do other things that God has forbidden (ie homophobia) so they can paint those obedient to the Bible in such a way for their purpose.
But we are being told to be in fear of this technology or precoursers to this. See posts #62, 66, & 70.