I suspect all of us humans lie to ourselves. We are wired that way.
The difference between self-declared “rationalists” and “believers” (“I don’t care about the evidence, I just want to believe in God”) may be just different sources of self-respect. The “believer” may actually respect himself more precisely because his faith is blind (“Blessed are those who have not seen and have believed”). The “rationalists” taking pride in being exactly the opposite, would search for logical arguments to motivate the position that in their heart they have already chosen. This is rarely difficult to do, as rational pro and contra arguments can be made for virtually any point of view.