Well what do you propose the meaning of the hadith is then? Was Muhammad saying Jabir, why marry someone with children when you can have someone with no children? Or do you think Muhammad was saying, Jabir, why marry that woman with kids, get yourself a kid to have sex with? I think if we are going to use this hadith to infer Muhammad's pedophilia it will be quite a stretch. It's just not there.
I think it is important to try and get into the mind state of those people as well when reading these reports. Have you ever been around a traditional people with a completely different mindset from yours? Tap into that experience when you read Islamic texts. And we shouldn't make the mistake of reading all these reports like there is some kind of evil intent behind them.
I understand why you are urging caution but there are some counterpoints to be made.
There was a longstanding tradition of pederasty in the middle east, and indeed around the Mediterranean, dating back well before Islam. In view of that it would not be at all surprising if Mohammed and others really did have a sexual interest in kids. It isn't definitive, but it is certainly well within the realms of possibility. This doesn't negate dynastic/social/business reasons for marriages but on the other hand they don't negate this factor either.
Regardless of whether there is a another element involved or not, it seems fairly plain that consumating a marriage with a child would involve sexual feelings for that child.
Devious, treacherous, murderous, neanderthal, sub-human of the West.