I absolutely agree with both of you. That double standard has annoyed me since the beginning. Jonno is human and flawed to the bone, just like Lionel, and as self-serving as Lionel (yes, on a smaller scale, but the same motivation is there). He is judgmental and intolerant trying to impose his own moral code on everything, and hypocritical to boot.

I still think this Clark has a chance to become Superman, but only if there's realization on his part (and on the writers' part, of course) that this is a double standard, and no moral superiority exists here, that the yardstick can't be one's own standards. He has to grow up and learn (like people often need to when growing up) that dad isn't perfect. Not everything dad does is good (just like lex needs to get out of the equally childish conception that everything HIS dad does is automatically bad). It's balance and tolerance that are lacking and have to be supplied, maybe from the broader minded Luthors. Clark will have to have an epiphany and see Jonno isn't such a paragon of good, by comparison to the not so hypocritical Luthors, or maybe Martha will give him a clue (I do miss the Lionel/Martha plot line). I'm afraid that can only happen in a fandom AU, though.
The JL Superman is always walking that thin line, and loses it at the moment he... (hmmm. can't spoil Kel.) You know what I mean.