Regarding Relativity of Simultaneity, is non-local "now" impossible?

[OmniThoughts]

TL;DR

"Why do some people claim against that, although not Relativity-fundamental, "there's a "non-local cosmic/universal non-privileged non-absolute 'now' that entails "co-existing/co-occuring but not "being in absolute sync""" that doesn't override nor cancel out anything"" when the light of the CMB is seen having the same patterns/temp in every direction & when light from "spacelike distance away" reach us but we can match when that light emission occured with during when in our local-time history?

Regarding Relativity of Simultaneity, is a non-local "now" impossible? "Why do some people claim against that, although not Relativity-fundamental, "there is a "non-local cosmic/universal non-privileged non-absolute 'now' that entails "co-existing/co-occuring but not "being in absolute sync""" that doesn't override nor cancel out anything"" when the light of the CMB is seen having the same patterns and temp in every direction and when light from "spacelike distance away" reach us but we can match when that light emission occured with during when in our local-time history?

 

[Dale]

Why do some people claim against that

Who specifically claims that, and where did they claim it?

Usually if you look in context then you can see why someone said something.