Earlier quoted context omitted.
> I'm not catholic so please help me out here. These are all reasonable questions. I'll answer as best as I can, but please understand that I'm not any kind of formal authority. > If you cannot use requested pronouns, does your religion also ban you from using nicknames? Is it okay for you to be called User23? I don't know of any Catholic doctrine that says people can't use pseudonyms, nicknames, or even change their…
Is it possible to say nothing about a trans co-workers transition then? If Jessica is now Kevin, what's the difference between that and Jacob going "nah call me Jake"? Is it just that you can't call Kevin he/him pronouns? Can you call Kevin as Kevin?
As another Catholic commenter said, we owe Christian charity to all other human beings, including those affected by gender dysphoria. However, charity doesn't mean being "nice" or "accommodating," but it does require respecting the dignity of the human person. One way to respect that dignity is by not encouraging or condoning disordered behaviors or beliefs. I wouldn't offer a recovering alcoholic a drink, even if it was really great stuff.
That leads to another pragmatic matter. No matter what disordered beliefs or behaviors a person has (and I have my own share), we should want to help that person come to a rightly ordered place. There's really no one size fits all approach to that.