the atom

Depends on which parts. A lot of the numbers are pretty out-to-lunch, but as far as I know, most of the technical details have never been contradicted by anything else.

My point exactly. One source doesn't override everything else (which I must say irritated me greatly at first). Ergo, Simply because one source said they used kiloton weapons, doesn't really mean that they're only capable of using kiloton weapons.

Do you.....speak english as a first language?

Space is another story, as Tyranid ships are stated to be weak by 40K standards, and the latest edition of Rogue Trader mentions that starships in 40K use kiloton-level weapons (except for Exterminatus).

What's the quote exactly? I think I may know what you're talking about, and I believe the context is refering to orbital support for people who aren't otherwise terribly useful as drifting ashes, a.k.a whoever they're trying to support.

In any case, cherry picking specific incidents to support your argument is no less intellectually dishonest then say, warsies snipping from ICS, or somebody getting ST firepower yields from the piddly bombardment in First Contact.

Not that it had much validity in the first place (12000kph in-atmosphere speeds for fighters anyone?), but this incident....doesn't really show much other then the fact that a 100MT explosion is still very much a big deal when it comes to ground warfare. There's nothing to indicate that these missiles would be much of a threat to warships at all. It's like pointing at the photon grenade from TOS and saying 'hurr hurr ST weaponz is teh weaksauce!!1!'.