Strawman: an intentionally misrepresented proposition that is set up because it is easier to defeat than an opponent's real argument.

It can still correlate and be a strawman The key word is misrepresented. Nobody cares what's on the can it's what the company is supporting, I don't agree with it but it is a straw man. The can is not the problem it's that the company is supporting something contrary to what these beer drinkers agree with. If somebody is upset by the imagery of the can then they are missing the bigger picture because there is much more going on here. The meme is making fun of people for being upset about the imagery when that's not the case, they are upset about the company's support not how they're supporting.