Star Trek: Voyager1995

[Otrin has surmised that Humanity has deliberately poisoned his planet]

Otrin:
It seems so obvious. You send us new technology, encourage us to use it, and then you wait for us to obliterate ourselves.

Chakotay:
Why would we do that?

Otrin:
Because it's easier than invading us.

Captain Kathryn Janeway:
Do you really believe we'd contaminate a world we intended to conquer?

Otrin:
I'm a scientist. I believe what I see. And today, I saw your people standing on our soil, just as you promised. And they were wearing equipment that protected them from the radiation, because they knew exactly what to expect. If you were in my position, what would you believe?