As I have stated before. It is entirely theoretical but if they do it legally, by electing a majority of officials in each of the state houses, then bills of secession pass respective houses and are signed by the governor of each state, I don't see how I or any other person that respects the intent of the Constitution could not.
However the actions being requested by these groups in the Southwest probably don't include going to any governing body under Constitutional procedure. These people just want to revolt and that is not a Republic, that's mob rule. So under the present plans that have been forwarded, no I do not support them