Gai isn't that much faster than Kakashi in base form.. We both know that. -_-
What? No. I have no idea where you're getting this from.
Gai has shown time and again the advantage he has over Kakashi is speed.
Gai's BASE speed rivals the Body Flicker itself.
You are underestimating Hidan's durability. Hidan didn't get blown apart.. The bombs exploded from all sides and made the wires that restrained him go deeper into his flesh so they cutted off his body parts. You can see that Hidan's body parts were in pieces like somebody cutted them off.
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Nah, Hidan can fight with broken bones. Atsugai broke his bones pretty much, seeing as it hit him head on.
It doesn't matter what did the damage regardless, the wires or the tags.
If Hidan can be cut by simple wires and explosive force, Gai's punches (which have tons -literally, tons- of force behind them) can tear Hidan apart.
With enough speed and power, a similar effect to cutting can be produced.
If I have a metal cube, I can cut that cube with a welders cutting tool.
With enough speed and power behind my punch, I could also shatter that cube with one punch.
I debuked that Hidan doesn't break from physical attacks which you keep ignoring.
Show me where, because it clearly isn't on this thread.