[Blide]

I think the other reason they're shooting it down is to prove they can actually shoot down a satellite which I don't think the US has actually ever done before. China shot one down last year and the United States condemned them for it, but by claiming they're preventing contamination, they don't look like hypocrites to the uninformed public. A missile test while destroying classified equipment would be killing two birds with one stone.

Should also mention that it would likely be a hell of a lot cheaper to clean up the potential contamination than it would be to actually shoot the satellite down.