اعوذ بالله
What on earth are you blundering
I don’t know who are those people you are referring to but I sure do hope they are not muslims
because that’s not a thing a basic believer, who was not tainted by the by others “shirky” beliefs and ideologies about God, would say
Please don’t spout this kind of stuff without knowledge, and be offended if someone point out it’s shirk
to put in simple terms, from my very limited humble knowledge, Allah (God) almighty is the creator not a creature, and he is “above” his creations and not “in it” or “part of it”
For example when you make a device, a very complicated one; you don’t become part of the device after it’s works
Therefore saying “he’s in us” and “hE iS uS” not only is blasphemous but it’s irrational and a sign of ignorance about Allah and his attributes..
I recommend watching people like Mohammed Hijab for this