Dear Pater, then go to FTDNA and inform Italy as your patrilineal location, because I couldn't find an Italian G-L30* in Block Tree. If you tested BigY, you should have made it clear in the message you deleted, but you mentioned only 23andMe, and suggested you didn't know if you are G-L497. Assuming you did test BigY, then next time communicate it better.
I'll try to explain it again, because you seem to be a newbie after all. No problem, but you should be more open and try to learn something rather than insist on error.
Firstly, Stalin was G-Z6552, i.e., G2a1. Stalin was not G-L30 (G2a2b) then.
This is the ISOGG phylogenetic tree of G:
https://docs.google.com/spreadsheets/d/111Iqo0vRt-sr8MJT7pavKQ0qoWxYSc1P7hnMRq3GijU/edit#gid=0
Notice that G-L30 is G2a2b, so everybody below G-L30 is closer to each other than they are to G-Z6552 (G2a1), when it comes to patrilineal ancestry.
This is the YFull tree of G2a (G-P15):
https://www.yfull.com/tree/G-P15/
TMRCA means Time to Most Recent Common Ancestor. The TMRCA between Stalin (G-Z6552) and us (you and me, G-L30, since I'm G-L497 then also G-L30) is 17400 ybp (years before present), which naturally corresponds to G-P15's. The TMRCA between you and I, in turn, corresponds to G-L30's, which is 14400 ybp. Got it? Our most recent common patrilineal ancestor lived 3000 years after your and Stalin's.
So, stop getting offended when I say you're confused. Don't be proud. Just try to understand what is written and learn something. No problem at all on it. If you're not getting what is written due to lack of details on my part, than ask deeper explanations
ED: correction.