General Discussion

Re: the "Early Life" section, we actually have a guideline about that. Discussion of the subject's religion is allowed only under specific circumstances, namely when "the subject's beliefs or sexual orientation are relevant to their public life or notability, according to reliable published sources." Unlike Christianity, which is far and away the prevailing religion in the US, religious minorities like Jews, Muslims, atheists, etc. are more likely to receive coverage of said religion because it stands out more (for example, Eight Crazy Nights by Adam Sandler is way more noteworthy than some Christian director making a by-the-books Christmas film; religious minorities are more likely to talk at length about how their difference in religion impacts their work and identity; etc.) This is also why you're more likely to see a mention that an individual is gay, trans, etc. than "Jimmy Carter was cis and straight."

For example, Natalie Portman is frequently interviewed about subjects like her Jewish heritage, and her 'Early life' section brings up her Jewish heritage. Penn Jillette frequently advocates for atheism, and his 'Early life' page talks about how he became an atheist in his early teens. Mehmet Oz ("Dr. Oz") has talked about his Muslim faith in the past and was the first Muslim ever nominated by the GOP for the US Senate, so his 'Early life' section brings up Islam.

TL;DR: This happens on articles about famous people who are Jewish at a far higher rate than it happens with Christians (at least ones in the US and other areas where Christianity is the dominant religion), but 1) it happens for a reason within guidelines, 2) for that reason, you're always welcome to challenge that it falls within those guidelines, and 3) as you note, the same thing happens with other religious minorities.