I think it's the same answer as for any religion: The holy book is long enough that you can cherry-pick and reinterpret any desired ideology from it, so you really need to look at a specific sect or an individual believer for a question like that has meaningful and consistently applicable answers.

I don't think anybody NEEDS to know anything about Islam. Just as nobody NEEDS to know anything about Harry Potter.

We could cherry pick some good things, or some bad things, but none of that would be representative of the views of every individual.

We could do the same cherry picking with any religion and paint them in as positive or negative light as we choose. Again, the list would not represent the ideals of all practicing individuals.

If you want to learn more about any religion, there are resources available online. I would recommend reading as many as possible to get more perspectives, but other than wanting to learn more, I don't see any reason why people would NEED to know anything at all.

*tenets

Well, I'd generally point to Wikipedia and say that's as much as most people could ever need to know without a specific reason to go deeper.

Really, all it takes to understand what's being talked about in the news is there, plus details.

For even less stringent uses, you could break it down to being a monotheistic religion that shares roots with judaism and christianty and has wide ranging rules that sometimes conflict with other religions and/or philosophies/moral codes.

Hell, most people, most of the time, all they need to know to get through life is that it's a religion. Even that's only necessary for casual conversations so you don't have to interrupt and ask what that word means.

Not to join.

Islamist Tenets:

Women are second class citizens

Non-Believers are second class citizens

Jews are the worst people on Earth

Gays should be stoned to death

Adulterers should be stoned to death

People who dance should be stoned to death

A bunch of other terrible shit….

But the simplest way to understand it is that Islam celebrates death, while Christianity, Judaism, Buddhism, and Hindu celebrates death life