Some clarification offered . . .
Calvinists go against obeying God because they say we cannot obey.
Reformers teach that all men fall short of the glory of God. No man can obey the moral demands of Holy God. Thus, no souls can be saved through following the Law. Romans 3:9-19
Yes. It is His command. From the beginning of creation, God has commanded man obey His will and Word. But no man can.
That is the reason and necessity for The Savior.
Calvinists say, "No, I cannot obey you, save me first".
No man says this, let alone a Calvinist. Romans 3:11
Those who are faith alone believers go against obeying Jesus too.
This terminology needs correcting:
Only Reformers teach Justification by faith alone.
You speak of the MADists, who are not "faith alone," but are really "grace only" believers.
They think salvation comes by grace, once and for all, and that they live by grace only forever after. They do not believe they sin or have to follow the Law in any way. It is a different belief than what the Reformers teach.
The Calvinists and Faith Alone believers are in a competition with each other on who obeys God the least!
"Grace only" MADists are offended by any talk of obedience. They practice lawlessness.
Reformers teach that obedience follows Justification. Sanctification is a holy lifestyle of obedience. Obedience cannot earn God's mercy, but obedience is the natural result and evidence that God has bestowed His saving grace to a sinner.
Obedience is the manifestation of faith and repentance, which only comes from being born again (regenerated) by the resurrection power of the Holy Spirit.
To believe and teach that we cannot obey is not right.
Unsaved souls cannot obey.
All men need The Savior, Jesus Christ, who alone DID perfectly follow and obey all the Law, on behalf of His church.
Saved souls can obey, and your teaching would be correct, if only applied to saved souls. Not obedience to gain points with God, though, but obedience for the pure joy of serving His righteousness.