But you were claiming that was why they fought an invasion. You deliberately misrepresented their efforts to push back an invader as being entirely about slavery, when any reasonable person would expect every man to fight back against what they see as invading tyranny and oppression.
You simply want to believe the propaganda that has been fed to all of us since the 1860s. You accept the official government narrative and all the acolytes who parrot the same narrative.
I get it. It's comforting to believe a Noble lie rather than an unpleasant truth.
And slavery couldn't expand. I've looked at the economic potential of slavery in the territories and it simply was never going to happen because it could not be economically viable.
That too was a lie that was fed to the public by the special interests in the Northeast for reasons of political advantage.
Even when Texas tells you why they did it, you reject it. They left BECAUSE THEY LOVED SLAVERY.