Yes, it was disrespectful as Sollozzo intended it. They're all scum anyway. But at that point Sollozzo thinks that Vito is dead and it's just a matter of making the necessary drug business arrangments. So, he makes disparaging references to small potatos.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
