If SJWs were caused by the religious right being strong, they would've cropped up hundreds of years earlier when the "religious right" was much stronger, not at secularism's peak in the 21st century. Just how powerful do you think the religious right was in the 1990s when SJWs grew up, anyway? Did they have institutional control - or were they just a loud, widely-mocked diversion? Put another way, was the kid whose half-senile grandma wouldn't let him watch cartoons or have pokeyman cards because they were the devil normal, or weird? It was weird where I grew up (btw I wasn't that kid).
I guess according to your logic, I should raise my kids as commie faggots if I want them to have traditionalist values later. We all exist in a state of permanent kneejerk rebellion, just like how you felt because dumb stupid christcuck grandma made you go to bed early instead of letting you stay up to watch Adult Swim all those years ago.
Again, religious right had many failings - chief among them focusing on stupid shit like pokemon cards instead of serious cultural issues - but those are issues of weakness, not of strength. You think because they were loud they were strong, but a dying animal is also loud. What you heard was a death rattle.
Counterpoint here, I think the decline of the Religious Right and traditionalist morality was inevitable but its death was a slow burn one. The reason why SJW's didn't pop up "hundreds of year earlier" is because of the unique conditions that allowed the decline of Christianity in the 20th Century. Here's a quick rundown of the events that led to where we got today.
1. The increased widespread literacy and the aftershocks of the Protestant Reformation
2. The austere and draconian sects that emerged from said Reformation, particularly in the Anglosphere
3. The Enlightenment as a whole, which may have had roots in Renaissance/Early Modern Christian thought but became increasingly humanistic over time.
4. The American Revolution and especially the French Revolution
5. The Industrial Revolution and the rise of technology and increased scientific evidence that debunked the Protestant Young Earth Creationist narrative (but not creationism as a whole, just so we're clear)
6. The horrors of World War I and World War II and their aftermath in Europe
7. The post-WWII economic boom in the United States
8. The end of the Cold War and the lack of a common enemy in the eyes of the American public
Points 6, 7, and 8 played the biggest role in breaking that hold and leading to the big rebellion and rise of the Woke Left and secularism
Also, my "christcuck grandma" didn't really care if I stayed up to watch Adult Swim. I'm not the strawman you seem to think I am. The scenario you described was considered the norm and not the exception where I grew up. I was one of the few who didn't have that experience growing up.
The whole "the Religious Right were just a diversion" argument doesn't hold water because the fundies did have a lot of institutional control in the Reagan years and were still strong on the regional level in the 90's and early 2000's.
Part of it is because they had a strong alliance with the neoconservative movement that largely bankrolled and propped up the Religious Right for close to the same reasons as the neoliberal corporatists back the Woke Left/SJW's, since the neolibs and neocons are more or less a corporatist uniparty.
It wasn't until Bush's blunders that the neocon-fundie alliance fell apart and the Religious Right rapidly lost power in Bush's second term and became the MSM whipping boy/controlled opposition that most of the Core Zoomers remember them as.
I do agree the Religious Right sperging about Halloween costumes and Pokemon cards was a result of their decline but not for the same reasons you think it was.
The really idiotic moments of the Religious Right like "the purple teletubby is queer!" and the attention whore antics of Westboro Baptist Church were signs of a death rattle but it was mainly because the Cold War ended.
The Soviet Union was a brutal militantly atheist dictatorship and the Marxist rhetoric of the New Left in the 60's and 70's and the collapse of the détente policies of Nixon and Carter by the end of the 70's were the fertile ground that allowed the Religious Right to get strong in the 80's and form their alliance with the neocons and corporatists.
The end of the Cold War in 1991 meant there was no common enemy to unite against and then the hysterics of the media coverage surrounding Ruby Ridge and Waco plus the actual miscarriage of justice that was the West Memphis Three court case was what began the decline in earnest during the 1990's and 2000's. Bush's failures really sped things up though.
expecting the youth vote to be a tighter race than they are expecting. The hardline Dangerhairs & Woke-Students are going to turn out to vote for the left, the would-be Covington Kids are going to turn out for the right; but the more casual left-leaning types are probably just going to sleep in, smoke some pot and order take-out. 
