I would respond to this with:
"Are you aware of the Signing of the 2D3 Mutual Protection Treaty? I suppose you're not. Very well - in the year 2016, 8chan /x/ first discovered sapient 2D lifeforms. We initiated first communications, but the phase-unevenness of our physical forms prevented direct contact. In 2017, scientists on both sides of the divide came to the conclusion that 2D completes us in the 3D phase, and vice versa. To this end, a Mutual Protection Treaty was signed, ensuring that we would provide these beings with protection, in exchange for completion. You call them 'pedophillic, infantilizing" and seek to eradicate them for the "crime" of offending your puritarian sensibilities.
And we will respond to this unprovoked attack against our true nakama with total genocide. Consider this a fair warning - we will not hesitate to exterminate your kind to protect those beings who reached out to us, and finally gave us peace."
I would respond to this with: "Are you aware of the Signing of the 2D3 Mutual Protection Treaty? I suppose you're not. Very well - in the year 2016, 8chan /x/ first discovered sapient 2D lifeforms. We initiated first communications, but the phase-unevenness of our physical forms prevented direct contact. In 2017, scientists on both sides of the divide came to the conclusion that 2D completes us in the 3D phase, and vice versa. To this end, a Mutual Protection Treaty was signed, ensuring that we would provide these beings with protection, in exchange for completion. You call them 'pedophillic, infantilizing" and seek to eradicate them for the "crime" of offending your puritarian sensibilities.
And we will respond to this unprovoked attack against our true nakama with total genocide. Consider this a fair warning - we will not hesitate to exterminate your kind to protect those beings who reached out to us, and finally gave us peace."