Storing away all of geocities for future reference is a good thing. Having every children memorize passages from geocities would be pointless and no one does it.
Having them learn a dead language is cruel, you are wasting their time to make them learn something that will only serve to keep them isolated.
And it's all in vain, making a language alive is the opposite of preserving it because live languages change.
No-one is arguing that children from minority communities should be prevented from learning an international language. The only question is whether they should be prevented from learning the language of their heritage.
Multilingualism is the norm. And it's easy enough to learn Math in English, English in English, and literature in your mother tongue.
And it's all in vain, making a language alive is the opposite of preserving it because live languages change.