Nothing wrong with fans looking ahead. It's not disrespectful, it's just that out of England/Belgium, Colombia, Sweden, Switzerland, Japan, Mexico and Brazil, there is 1 clear side that is on a different level to the rest in terms of both history and current player ability. And that's Brazil. So if given the choice, many would rather pick the other. You don't lose intentionally to go on that side, but it's not a big deal if you do.
Anyway, on the actual game... A full strength Colombia would be a much tougher ask, and possibly slight favorites over England as they are more proven IMO. But with no James, England would be considerable favorites. My guess is they'll play him and he'll be half fit, but England will still get the win. But it will be by far the toughest test, because it's still hard to judge both England and Belgium in this group. Tunisia and Panama are both trash so those games didn't show anything other then they can beat the shit teams, while the 3rd game was a dead rubber that says nothing. So that's a disadvantage for England IMO. Perhaps not having the right competitive intensity from the opening 3 games. We'll see though.