The Sabbath reinstated during the Tribulation is not valid because the work of Christ is not yet complete. It is observed in conjunction with Temple built during the Tribulation and is therefore not recognized. The Sabbath that is observed AFTER the Tribulation is the one reinstated by the Kingship of Christ and IS recognized.
You are mixing up your scriptures to try and prove your point and in doing so your errors are very apparent.
No. Here is an example of why I think Evangelicals don’t understand the law. That is their particular shortcoming, I respectfully think.
If God could suspend the law at any time, He could have suspended it prior to man’s Creation, negating the issue of sin and the need for Christ to die. If God could have negated the law, but only choose to do so after great suffering and the death of His Son, it means that God is not loving and longsuffering, which makes Him a liar, for that is what He says about Himself.
The fact that God did not negate the law for the sake of His Son and the fact that He says we will be keeping those very same in the New Earth means that the law is likely not negateable under and circumstances and is just as valid now as it was back then and will be in the future.