Actually, there are a couple reasons:
1. Stating opinions as incontrovertible facts. This is the sort of thing where you say "I disagree," rather than "You are wrong, stop pretending you know what you're talking about." This isn't a peer-reviewed study supported by empirical research, it's people with different opinions.
2. He and I were already on bad terms because of another time where he didn't agree with me and started an argument in pretty much the exact same way, minus restraint from me. It's the one where either you or him tried to report me because I didn't roll over and play dead, if I recall.
3. He's not active in the campaign. It feels quite heavily like he's going out of his way to poke his nose into places just to try to get one over on people and "prove" how superior he is -- by haranguing people over differences of opinion and insubstantial tidbits.
There are ways to be a hostile jerk without blatantly insulting people, you realize? Worse, instead of just dropping it, he calls you up to tag in for him and continue the argument by defending him and deliberately misquoting people? The problem is quite evident, I think. I'm not the DM for this campaign, but I jolly well will report you or him if you try to start more arguments, okay? I'm not going to be responding to you any more either.
What he's saying is incontrovertible "fact" (as fact as it can be). It's the entire reason for the Tier list; the Wizard is stronger than the Fighter at all levels. It
is a peer-reviewed study supported by empirical research. People have sat down and looked at the options available to the Wizard versus the Fighter, and have concluded the Fighter is inferior. It wasn't only Harb who did this, it was a great number of people over a long period of time. This isn't to say that the Wizard is
better than the Fighter. The Fighter can certainly be the best choice for circumstances. Those circumstances just assume that the party doesn't
want a Tier 1. It doesn't
want someone to be super strong in every situation. This is generally most true when the entire party is around the same Tier.
You are also giving crap to Harb for "starting" something when I
explicitly asked him to come in for me as he's more experienced with D&D than me.
I was the one with the problem of people saying that the Fighter was better than the Wizard at level 1. This wasn't true for what was being argued, and it certainly wasn't true by the example given. You never offered any kind of proof that the Fighter was better than the Wizard, only stated it, and when challenged, you insulted him (for prior aggression) and refused to actually enter into a discussion with him whilst writing him off.
When I enter in to defend his integrity, you assault
my integrity (again, for prior aggression in which you were the primary offender). Yes, Harb is a jerk. We get that. It's not that difficult to see past him being a jerk and actually get along with him. I will also not stand here and let you rail on other people.