learning experience
Much of the feedback so far weighs in on the side of "required -- family is family". Someone cited honoring one's parents (the source of the request), and a couple people mentioned protecting a life (the sibling is apparently in real danger of injury without someone there).
I, on the other hand, am leaning toward "forbidden", though "permitted" is a possibility. Definitely not "required", though.
The issue is complex. While the sibling needs a caregiver, that's a service that can be hired -- so there's no apparent need for the poster to do it personally. Of course it's important to honor one's parents (this comes up a lot in text), but the talmud also teaches that if a parent asks you to transgress the Torah, you must decline (Bava Metzia 32a). This raises the question of whether attending another religion's worship service -- on its second-holiest day, to boot -- is avodah zara, forbidden worship. Is it enough if you don't intend to worship? What if you don't participate? What if you don't listen? That is a complex question with varied answers depending on circumstances, ranging from exactly what will take place to the strength of your own Jewish education and commitment, and you really need to ask your rabbi for a personal ruling.
I think the experience of facing this issue is valuable for the conversion candidate, actually. As a member of a minority religion (that sometimes faces hostility from others), sometimes you are going to have to make choices between your religion and your family/friends/society -- things like this, or resolving Shabbat issues with your employer, or various other matters. Finding out how you will handle those choices before it's "too late" -- before you convert and acquire new obligations -- seems useful to me.
I assume that most conversion candidates face some sort of religion-vs-world-at-large test during the process, but I don't actually know.
no subject
My mother knows that I no longer follow the Christian faith and have no desire to do so again. Yet, she keeps inviting me to go to church with her, and often not in a way that is especially respectful (e.g. claiming that I need to come to church as part of learning to lead an ethical life). I always refuse, not only because it conflicts with my own beliefs but because it seems disrespectful of the church as well. I wouldn't be there out of belief, or sincere interest in the faith, or for purposes of cultural learning and research (it's the church I went to growing up, so I have a reasonable idea of what it's like). So I can either sit there listening and not participating at all, which would arouse people's curiousity and put me in the unenviable position of trying to explain myself to my parents' friends without offending anyone (although I suppose that's my problem), or I can play "religious dress-up" by going through the motions of a service I don't believe in. That feels hypocritical to me, and I also feel like it would be offensive to people who actually believed in the service.
Eh. I wonder if we would get along better on this issue if I had actively chosen another religion rather than just leaving one. That way I could say "I'm not going to church because I think God actually wants me to do something else instead" rather than "I'm not going to church and I don't necessarily believe that I'm supposed to be doing anything at all".
no subject
Eh. I wonder if we would get along better on this issue if I had actively chosen another religion rather than just leaving one.
That could be. My father hasn't called me a heathen in years. (Mind, he was never nasty about it, but it was there...) And for some reason, people sometimes just seem unwilling to believe that you can follow a set of ethics not out of religious belief but out of belief that this is The Right Thing To Do.