Is that gun to be pointed at those states remaining? Again, don't they have rights to be respected and protected?
As for the means I believe that the Constitution provides the implied method for accomplishing secession. A majority vote in Congress is required to join the Union, I believe a majority vote in Congress should all that is required to leave as well.
Lincoln chose to end the debate by invasion of the south. Yes, yes, the south fired first, I know. But a more rational approach could still have been considered.
What is rational about bombarding a fort for 24 hours and trying to kill every man in it? If all the rationality was on the Northern side then what difference would that have made with the irrational South? The line was crossed when the South chose war to achieve their ends. Lincoln merely reacted to their actions.
I believe that Texas, expressed in its admission to the USA the right to withdraw, as well as the right to divide itself into multiple states (a good idea!! see below ) should it choose to do so. I am not 100% certain on that, as I have never seen proof of that)
The Constitution makes it clear that no single state can have rights denied to other states. Texas can no more withdraw unilaterally than Illinois or Alabama can. The Supreme Court made that clear in their 1869 decision in Texas v White. As for Texas partitioning, that option was open to them prior to their admission to the Union. If they want to partition now then they must follow the procedures laid out in Article IV, Section 3.
Why Multiple Texas'? -- If Texas divided into three or four states, we no doubt would have more Republicans in both houses of Congress!!
Not necessarily. Five times as many Texas' wouldn't mean 5 times as many congressmen. You would partition the current number among the 5 states, and some may lose congressmen in the next census. You would have 5 times as many Senators, which is the biggest reason why such a plan would never make it through Congress.
You really should pay closer attention and read what is written before you reply. I never stated "More Congressmen", I stated: "More Republicans". That remains a valid projection of the probable voting pattern of the good people of Texas.