Because they are the one group that doesn’t need to think “If I start singling out this group of people for any reason, then others will use that same approach with me”. Ironically, the reason for the vigour of their fascism is the blindly stupid argument that young white men will soon be exctinct.
FOSS s such a wide area of practice. There is no detriment in supporting a FOSS keyboard or image editor. Perhaps for these, or for software that might sails across the lines you might consider Monero, or similar.