You need to understand, a good portion of the rights base sees the GOP as morally righteous Christians. Racism and homophobia are A-OK according the the bible (at least the parts they don't ignore). What matters to them is the GOP politicians appear to be the kind of person who never swears, rarely drinks (except beer), is morally pure in the bedroom (and if they aren't, it's just a crisis of faith), goes to bed early, and is working tirelessly to defend the country from the evil liberals and Joe Biden, who is somehow both a dementia-riddled invalid and also the anti-christ.
This is the kind of world view many of the rights supporters have. They don't particularly mind if you start promoting fascism or literally quote Hitler, as long as you still appear like the perfect example of someone living the 1960's American Dream. The kind of person who could be invited to the country club and is always helping at the church picnic.
But swearing?! One of the Stepford wives has caused a scene with her unchristian language and, my God, it's ruining the bake sale! She certainly won't be getting invites to any of the upcoming dinner parties.