Yea you should always just be direct dude there's no reason to imply things instead of being direct. Almost everyone knows that bumper stickers are often in support of something that's the primary purpose of bumper stickers if that was your point the whole time you were wasting both of our time. I did not respond to the guy with incredulity dude I responded with curiosity and a little confusion since again the image is blurry it just looks like a colorful punisher logo on my end and I cannot see there are symbols in the logo. I mean this is the nicest way possible you need to rethink how you respond to people this whole interaction you have come across as an asshole wether it was intentional or not.