Pew has nothing to do with Forward, they do respectable polls of US population.
Of course, numbers are skewed based on who they count as Jews, given intermarriage rate in previous generations, nebach. So, now “75%” includes many legit marriages between two upstanding bnei Noach who are confused to think they are Jewish. Maybe, we can, l’tzad schus, think of Reform as a bnei Noach movement. Although, they may be struggling with ever min hachai from the time of the treife banquet …
We also need to downgrade 7.5 to some actual number, making Israel a place of most Jews (I presume Israel uses halachik definition in their count excluding non-Jews who came under the law of return).
But the bottom line from Pew is that:
R- intermarries dramatically
C- ages and has no children
O- world grows fast, but organically only. Not many switches from R, C to O, despite Chabad and yeshivot for BTs, and Kars for Kids heroic efforts …
maybe someone can look and compare changes between denominations in previous Pew reports.
I skipped “unaffiliated” here, don’t know how to analyze them