It's not a particularly nuanced statement in the first place, is it?
You know full well what their intent is with this rhetoric. You know full well the point they are trying to raise. The fact that you insist on arguing about the messenger and tone of message shows you don't want to engage with the problem being raised in good faith.
I don't care about the tone, I don't think they are serious, I think they are using hyperbole to bring attention to the issue. They are a minor party, I doubt we would be talking about it otherwise.
I am capable of engaging in the discussion without focussing only on the tone of message and dismissing everything else.