Nationalcosmopolitan, as a former teacher, may I just say that your plan is both idiotic, and unworkable.
First, you want to force everyone in the world to adhere to a plan based on your own particular religious convictions, and the vast majority of the world's population will tell you where you can shove that idea.
Second, some people just suck at languages. It's a fact. The same way some people suck at maths, or science, or telling jokes. That's just the way we are. Some people are so bad at languages that they can't even speak their own single mother tongue correctly. And you want these people to learn 2 additional languages. Even if you could get everyone to agree to your plan, it wouldn't work, because there will be huge numbers of kids who just can't cope with learning more than one language.
Third, even if you could get everyone to agree to your plan, AND every kid in the world had the capability, loads of those kids would simply refuse to pay attention in class, and would refuse to do their 3rd language homework. That's just reality. And anyone who's ever taught in a school will confirm it.
Fourthly, as has already been pointed out by others, to be a native bilingual requires that one either have parents with different native languages, or one grows up in a country which has a different native language to your parents.
I actually know 3 kids who are natively trilingual - their father is Australian, their mother is Finnish, and they're growing up in China, so they speak English, Finnish, and Chinese, all like native speakers.
And that really is the only way to work it. Which means that, for your plan to work, everybody in the world world would have to have kids with a partner who speaks a different language from them, AND live in a country which speaks a third language. Of course, if everyone in the world did this, then the country they moved to for the third language would be completely depopulated of native speakers, and full of speakers of all sorts of other languages, and the kids would grow up surrounded by people speaking so many different languages that nobody would be able to talk to anybody else! And then, of course, you'd have the problem of schooling, because all the teachers would speak their own language, and without a common language the kids' educations would suffer. You'd end up with a world in which meaningful communication was pretty much impossible in day to day life, and everyone grew up knowing little bits of dozens of languages.
It would be anarchy.
It's also utterly pointless.