I think it is rarely worthwhile trying to convince someone who is resistant to an idea, whether it relates to
politics, religion, or yes, even natural personal hygiene items. And why do we try? Usually because we think ours is the “right” way, and whether we intend to or not, and whether we are even aware of it, I think we often telegraph that our position/interpretation/practice is the superior one, and if only people would open their minds and do as we say, all would be well in the world.
Maybe one approach would be to not raise the issue in front of him again and quietly go about what you are doing. You both already know what the other thinks, and that it will not be a productive conversation. If he asks, have a breezy
answer at the ready, like “yes, and I saved $300 over the last 6 months making my own deodorant” or whatever might resonate. It often takes time for an idea to take
root and begin to grow, and having that debate at every family gathering is the equivalent of compacting the soil and spraying with roundup. We already know he has a “position” on the issue of chemicals - he may never change it. Or, maybe the thought of saving $600 per year on personal care items will be the
compost tea that feeds the
roots of change?
I find myself doing it all the time, sorting, categorizing, judging, wanting to convince others, show them the light, convince them to change. Very human - we are very tribal creatures. We want people on our team, and having an “opposing” team can be energizing and unifying. But each of us are on our own journey, and have arrived where we are due to a million different tiny influences and nudges, and yes, maybe a few really big influences - Mollison, Holzer, Lawton, Wheaton. Their ideas fell on receptive soil - nobody debated us into becoming Permies. We were receptive to it for whatever collection of reasons we accumulated along our journey.