Your take is so far off the mark. Conservative voices have screamed for decades about supporting the troops as some form of projected nationalism. This was all just fine until Trump came along and started being horrid to veterans, especially those who were captured, injured, or killed. Then Conservatives started becoming directly hostile towards veteran families.
The point here is that Conservatives chanted the chant but never got behind making life better for veterans. The person you are responding to simply pointed out this discordance.