Also Zephy just saying that IMRO was Bulgarian tells you how uninformed he is and probably not even serious about this topic.
(IMRO literally means Internal Macedonian Revolutionary Organization and their goal was to create a free and independent Macedonian state , not Bulgarian.)
Goce Delchev , one of the best known revolutionaries of that time died 1903 and rests in Skopje not in Sofia do you know why?
Because when he died he wanted his grave to be in the capital of a Macedonian nation if it ever formed.
He promoted the "Macedonia for the Macedonians" idea as well as many of the organizations members , while Bulgaria already was a free state by this point
and if they were really Bulgarians they would promote seceding the region to Bulgaria and founding an organization for free west Bulgaria or something similar.
k then, explain Hristo Tatarchev quote.
Or the fact that IMRO was originally called Bulgarian Macedonian-Adrianople Revolutionary Committees
Or the fact that it fought at the side of the Bulgarian army during both Balkan Wars
Or the fact that the organisation disbanded itself during the 1915-1918 Bulgarian annexation of Macedonia only for it to be reestablished in 1920 after Bulgaria lost the land again.
Or the fact that it used schools of the Bulgarian Exarchate as part of its network
Or the letter that Dame Gruev and Boris Sarafov sent to the Bulgarian government during the Ilinden uprising, that said "The general staff considers for its duty to pay attention of the honoured Bulgarian government to the catastrophic consequences for Bulgarian nation, in case the government doesn't fulfill its duty toward its homogeneous brothers here in an impressible and energetic way, imposed by the circumstances and the danger, which threaten Bulgarian fatherland today."
Or Dimitar Vlahov's quote, that said "Firstly the revolutionary organization began to work among the Bulgarian population, even not among the whole of it, but only among this part, which participated in the Bulgarian Exarchate. IMRO treated suspiciously to the Bulgarians, which participated in other churches, as the Greek Patriarchate, the Catholic Church and the Protestant Church. As to the revolutionary activity among the other nationalities as Turks, Albanians, Greeks and Vlahs, such question did not exist for the founders of the organization. These other nationalities were for IMRO foreign people... Later, when the leaders of IMARO saw, that the idea for liberation of Macedonia can find followers among the Bulgarians non-Exarchists, as also among the other nationalities in Macedonia, and under the pressure from IMARO-members with left, socialist or anarchist convictions, they changed the statute of IMARO in sense, that member of IMARO can be any Macedonian, regardless of ethnicity or religious denomination."
Or the fact that Goce Delchev, whom you mentioned, looked up to Bulgarian revolutionaries from Bulgaria proper, or that he studied in the Sts. Cyril and Methodius Bulgarian Men's High School of Thessaloniki (Solunska balgarska mazhka gimnazia „Sv. sv. Kiril i Metodiy"), and called himself Bulgarian, and simply believed in an independent multiethnic Macedonian state that included his fellow Macedonian Bulgarians?
Or the fact that he wasn't even buried in Skopje, as you claim, but in Banitsa, a village in modern Greece near Serres, before his grave was moved by the Bulgarian army during WW2 to Xanthe, then Plovdiv, and then Sofia, before being returned to Banitsa?
How about Petar Poparsov, who moved to Bulgaria after the Balkan Wars, called himself Bulgarian, and repeatedly protested the Serbianisation of Macedonian Bulgarians?
Or Andon Dimitrov and Hristo Batandzhiev, who founded a political party called "Bulgarian Constitutional Clubs"?
Why did all of these people call themselves Bulgarians? And never brought up any ludicrous claims about being descendants of Alexander the Great or god knows what?
It's almost as if they were Bulgarians.