You say "knowingly patronise", I say "buy some bread". Grownups recognize that we live in a society and people hold different opinions. How can you be sure there are no nazis feeding you, clothing you, transporting you? Especially with the ever-widening scope of that term, it's on the verge of making no sense, being a catch-all term for stuff people don't like. Instead of engaging others and finding common ground, people are behaving like kids, completely blocking others out for any documented slight.