By who is the question.
Most vets in DC area are retired officers. The officer corps is by and large pretty much leftist.
Didn’t see those signs on my TV last night. But then again, I turned it on at the bottom of the 1st and only lasted to the 5th inning. But I thought I did see an older fellow in a red MAGA hat in the first row behind the plate (he would have been a few seats off the screen to the left of the guy in the orange in your pic.)