Sechel, are you implying that only chabad understands the greatness of Hashem and how big a tzadik can be?
Have you ever seen a gadol who’s not chabad daven? Try it out. What you’re saying is incredibly offensive and myopic.
No one has a problem with tzadikim living forever in olam haba or after techias hamaysim. The issue is that there are people saying that a mortal should live forever in the simple sense, just living like you and me without ever dying.
If you want to know how litvishe understand gadlus Hashem, have you ever learned nefesh hachaim? Daas torah? Rav dessler? Sichos mussar? Or are you talking from complete self imposed ignorance?