I'm giving you the definition of idolatry, Idolater. By definition, regardless of what religion you're from, putting anything other than God in the place of God is idolatry.
"the place of God" is accepting the sacrifice of the Mass, which is offered to Him upon an altar.
A location (however figurative) is not an action (which cannot be a figure of speech).
To use an analogy, God is on a pedestal. Idolatry is taking God off of that pedestal and replacing Him with something else. You (and the entire Catholic church) do just that by claiming that Mary (or any saint, for that matter) can and does intercede for men. You take God off the pedestal of "the One and Only Intercessor, the One Mediator," and replace Him with Mary.
So in order for Catholics to "[put] anything other than God in the place of God" to commit idolatry, we would need to offer sacrifices to something other than the Father.
Sacrifice has nothing to do with it, and even if there was, it would be sacrificing your worship of Him for worship of something/someone other than God.