I think he's saying Tali shows signs of racism, at least against the geth.
And while Tali may have taken the tech from the SR2, it was still tech lifted from the Alliance. (I guess you could say Cerberus stole it first).
Whether the prediction was stupidly obvious or not, she was still right. Exactly right.
She's not a speciest, she's a nationalist. She doesn't trust the asari to have the Alliance's best interests in mind any more than she trusts Cerberus. Or even your average politician.
Cerberus were the ones who encouraged the alliance to develop the SR1 with the Turians in the first place. And doubtless, they had their own people in the operation as well. Granted, I don't believe Tali should have taken any information or schematics without my own blessing (which would be denied by me every time). I'd say Tali got the information from the SR1 anyway, seeing as you never have to recruit her in ME2.
Otherwise, you've lost coherency in your argument.
I don't think you understand what nationalism is, and that it can take many different forms and vary in strength from one end to another.
Ashley is a nationalist (I would personally consider her patriotism to be disturbingly abnormal, especially in regards to the alliance), which is juxtaposed next to inherent distrust of politicians and aliens (for which I'd call her a paranoid nutjob who needs a psyche evaluation and a category 6 discharge). She is also a racist, a speciesist. Denial of terms does not undercut their meaning. You're saying that because something is orange, it can not also be round. I am saying that it can indeed be both orange and round.