This is one of many t-shirts sold on a website that celebrates anti-liberal hate-mongering. I was particularly struck by their take on cultural diversity. In their racist minds, it's only the diversity of their guns that matters. There's also a t-shirt with a likeness of Ann Coulter featuring her famous quote from September 13, 2001: "We should invade their countries, kill their leaders, and convert them to Christianity."
"Imagine no liberals" is a revealing proposition, when you think about it. It's what they really want: a world of people who all think alike.