If you decide to view this as a troll, you should also condone the people who invade Windows-related Lemmy posts just to advocate for Linux.
If someone makes a top level post about it, yes I would, for the same reasons.
If it's a comment that flows naturally from conversation, I don't see the problem. (in either case)
But I think you meant condemn, not condone.
Switching back to Windows is just one point OP made, which you decided to focus on.
It's literally the only point they made. The rest is their justification for that point.