Imām Adh-Dhahabee said: with my chain of narration to Al-Khateeb who said: Alee Ibn Talhah narrated to us that: Sālih Ibn Ahmad Al-Hamadhānee informed us that: Abdur-Rahmān Ibn Hamdān Ibn Marzabān narrated to us and said:
Abu Hātim ar-Rāzee (d. 277) said:
“If you see a person from Baghdād loving Ahmad Ibn Hanbal (d. 241), then know that he is a person of Sunnah and if you see him hating Yahyā Ibn Ma’een (d. 233), then know he is a liar!”
Siyar A’lām an-Nubalā 11/72 onwards.
The same can be said about the Scholars of Sunnah and Salafiyyah even today.