Leeks, Onions, Garlic, and God

I despise _____. We all can probably fill in that blank with at least one word. Some of us could probably give several examples. I’m pretty sure everyone in the Northeast would say they despise WINTER right about now. Can I get an AMEN? Longest. Winter. EVER! Bring on spring, right? So, what do leeks, onions, garlic and God have to do with despising?