I'm just stating a fact here. Regardless what side you're on, threatening physical harm harm on others shouldn't be tolerated. If they're guests who are here on student visas, if they want to jeopardize that, that's a risk they take.
Well, that may or may not be intentional. The people displaying that should know how it would be perceived here as well. Not really smart if you know people are going to misinterpret your message.