CA, if you’re asked about whether you believe with complete faith that judaism is 100% true and other religions are false, and if your response is anything other than a clarion “yes”, you’ve sadly left torah Judaism, as the rambam clearly writes (teshuva, perek 3) that if one doesn’t believe in one word of the Torah, it’s tantamount to disbelief in the entire torah. Doubts are halachikally the same as kefirah (ayin shom).
It sounds like what you meant to say is that you have emunah but not yediah, which is something i agree that most people do not have. Your reply to ujm however, sounds as though you’re admitting to having at least some uncertainty about certain elements of torah, or that your notion of yediah/emunah is equivalent to uncertainty, that if one is a maamin he must perforce not have absolute certainty. That simply isn’t the idea of emunah that is discussed in chazal, rishonim etc – emunah is an affirmation,a statement that one affirms the truth of whatever it is he is maamin in.
A maamin would not want his emunah to come into question by muddling the terms and portraying even the suggestion of there being a doubt in one’s mind.
I do think ujm overreacted a little to the initial post; i would have, before CA went on, assumed he was talking about other religions and not thought much into it