Tucker is an intelligence asset. Whatever he's saying should be understood through that lens. There's an agenda behind this "opposition". One angle could be that the state needs a narrative angle to back down if it turns out that they indeed do not have the strategic advantage required to attack. Another angle might be that these are sheepdogs gathering the right-wing population to them and when the bombs drop the sheepdogs will turn the narrative towards "we have to support dear leader in times of war" because there needs to be some influence over the militia movement and lone wolves that might break rank over this.

I'm sure I haven't figured out the angle yet, but my gut tells me that Tucker and MTG breaking with Trump and Cruz is orchestrated.