I literally cited a scientific study as my final link.
But given that you think people who like cats are "toxo+ cat lunatics," I think there's no productivity in this exchange. You clearly have some really strong biases, and you've made clear what I was already inferring from your comments - you won't agree with anything that doesn't support your incorrect viewpoint.
https://www.unitedspayalliance.org/feral-cats-if-you-feed-th... https://www.felina-sicily.org/en/how-to/to-feed-or-not/ https://www.feralcats.com/good-neighbor https://spayneuterspringfield.org/feral-cat-info
and here's a study describing what happens when one doesn't take this approach:
https://www.dvm360.com/view/feral-cats-fed-not-cared
All of these were on the first page of Google for 'feeding neutered feral cats only if fixed' or 'feeding neutered feral cats only if fixed study'
What I'm suggesting is standard and recommended practice.