Yeah that is 1000% untrue.
Conor McGregor's resume' >>> Weidman, Cain, Woodley, Holloway, probably (definitely but less so) Hendo and Shogun, and arguably BJ's but I'd say no I guess on that.
Stipe is a bit of a stretch too, and DC isn't that far ahead but is definitely ahead. Mighty Mouse is above but fought shit competition arguably, and half the guys you mentioned aren't from this decade anyway btw.
Israel has 7 UFC fights total, has fought 2 actually good fighters (3 if we count Brunson) and has 0 title defenses. No.
Tony's resume'? No. Khabib? close and arguable, but McGregor has much better wins and accolades. Usman? No.
GSP, SIlva, Aldo, Fedor, Hendo, Shogun, BJ are all not from this decade btw, their primes and starts of championship runs are from last decade, in the 2000s.
The fact of the matter is McGregor dethroned the FW GOAT - Aldo - who many considered a top 3-5 all-timer at that point, and he went undefeated at FW and beat Mendes a legit elite wrestler, and other names like Holloway and Porier even if they weren't in their primes or best forms. He then won the LW title and destroyed the LW champion Eddie Alvarez, and has won at WW* against two top 10 caliber opponents in Cerrone and Diaz. He fought the boxing GOAT in boxing too in between.
You say you're a McGregor fanboy but you think Max fucking Holloway has a better claim to GOAT status? Why? Cain, Weidman, Izzy, Tony? Just a yikes from me. All those guys are clearly inferior. Cain broke down, Tony has never even won a real belt or beat elite competition arguably, Weidman beat Silva twice and a deflated Belfort and then fell off hard, Izzy has done little. McGregor has only lost to Khabib and Diaz two weight classes above his original, which he avenged. Two belts same time, big names on the resume'. It's facts.