Yes, I am rebutting the comment I replied to. Not every reply to every comment needs to assume the grandparent comment as necessary context; it's perfectly fine

Yes, I am rebutting the comment I replied to. Not every reply to every comment needs to assume the grandparent comment as necessary context; it's perfectly fine as far as I know to start tangents. Also, the grandparent comment did not discuss immigration policy, so by your standard the parent is an irrelevant rebuttal.