Keep in mind that Tony has NO IDEA about Raymond's treachery.
He does seem to know that Vito Spatafore has been running his mouth behind Tony's back (as we saw at Raymond's birthday party).
Pretty much the only one in the Soprano Family who has shown 100% loyalty to Tony is Silvio. All the rest have been shown to have malcontent feelings toward the boss at one time or another: Paulie, Christopher, Junior, Furio, Big Pussy, Richie Aprile, Ralphie Cifaretto, Patsy Parisi, Larry Boy Barese, Vito, Carlo Gervasi, Albert Barese, Bobby Bacala, Hesh... the list goes on.