Question

Is this a grammatically correct sentence?
"Those who criticize our generation,forget who raised it. "

Answer 1

Yes, but the comma is not necessary. The subject is "Those who criticize our generation", and the predicate is "forgot who raised it." The word "forgot" is the verb showing the action of the subject.

"Who" is correct in both cases, as it acts as a subject ("who criticize", "who raised"), not as an object, in which case it would be "whom".

Answer 2

No, it is not grammatically correct. Your comma usage is incorrect. Omit the comma.