They didn’t need to dupe anyone; the program is indisputably not popular and they implemented it anyway. The two goals of congestion pricing have always been to generate revenue for the MTA and reduce congestion/pollution in Manhattan. They never hid that. Most transit advocates support both of those goals, and the beauty of congestion pricing (as opposed to a revenue-only option like an extra tax on businesses in the congestion zone) is that it can accomplish both at once.
I’d also note that popularity has been going up as everyone sees the benefits immediately and the predictions of a business meltdown turned out not to be true. It feels very similar to the bans on indoor smoking where smokers predicted restaurants and bars would close and the opposite happened.
