Welcome aboard, @Jon38, and I’m glad to hear you have combat and martial arts training, especially as you out yourself as a liberal 
Like you, I’m a liberal combat vet, although well before your time, and ardent CCW advocate. While we’re definitely the minority here, the vast majority of folks here are civil and engaged and there are some great conversations across our many divides. From time to time you may be called a communist who is intent on destroying America, but it’s all in good fun…
If you want to get a sense of the place, head on over to this thread:
Another leftie vet outed himself last week and, well, see for yourself. As I say, about 90% is civil and thoughtful, which is saying a lot in this day and age.
In any event, welcome aboard – glad to have you!