Killing isn't an ideology, it's an action. If Assad has any ideology at all, it is Alawi supremacist nationalism, but even that suggests far more belief in something than the man has ever demonstrated.

Bashar Al Assad is a flailing failure of a dictator who has shattered what remained of the economy he accidentally inherited from his father when his loser brother was turned into soup-like homogenate in the Swiss Alps. His father betrayed everyone he ever worked with and regularly backed supporting reactionary regimes throughout the region. He kills people because it is the only way to retain power. Most of the people he kills are Syrians.

Soleimani, at least, had an ideology. He was a member of the IRGC, the organization primarily responsible for the preservation of the Islamic State. A regime that ascended into power with the help of Marxists, then turned around and murdered them in the streets. The command of the IRGC is a profiteering elite permitted special monopolies over industrial interests. In short, it supports hyperexploitative capitalism mixed with reactionary bigotry. A great ideology for a "people's hero", I'm sure.