Did Charles Darnay make the right decision by returning to France in A Tale of Two Cities?

On a moral level, Darnay made the right decision. His intention was to rescue his uncle's faithful servant Gabelle from being killed by the revolutionaries. Gabelle personally begged him to save his life. So on moral grounds, Darnay was in the right, since he is motivated by compassion.
However, was it necessarily wise to go to Paris at that time? No, because Darnay's position as an aristocrat pretty much ensured that he would be arrested the moment he set foot in France, so any attempt to save Gabelle was doomed. Even Defarge wonders why Darnay would be so foolish as to return to revolutionary France.
So, Darnay's decision to return says much about him as a character: it reveals his noble spirit and compassion, as well as his naivete. It was ultimately an unwise decision, even if it was motivated by good intentions.