Some secular dudes, just like some religious people being degenerates.
I don't doubt that religion probably smoothed some behaviors here and there, but secularism isn't the source of modern problems. It's a symptom.
No, Secularism isn't the source of the problem.
Human nature is. Human nature is to be in conflict between being made in God's image, and fallen in sin. Or to use secular terms, to be capable of both good and evil.
The reason secularism is dangerous, is because
it allows people to justify that a thing 'isn't really evil.' Once you reject higher moral authority, you get to rewrite the rules however you want.
This can be as petty as a six year old going 'he said something so mean it was okay for me to try to beat him up!'
Or it can be as horrifying as 'My people are the only
real people, everyone else must be killed or turned into our slaves.'
You will find,
time and again, that whatever immoral behavior that a secularist struggles with, they'll have personally redefined the rules so that it's either 'less bad,' not wrong in the first place, or outright
a good thing.
Which is how you get to 'it's child abuse to
not castrate and mutilate children who have gender dysphoria.'
Sure, most secularists will try to hold onto the
rest of (generally Christian-derived) morality, don't steal, don't cheat, don't murder, etc. But how many people rewriting 'Past grievances mean it's perfectly moral for me to rob stores' do you need to break the economy? How many sterilized children do we need to hit demographic collapse? How many 'it's okay for me to massively disrupt everyone's life to save the environment!' types does it take to ruin people's lives?
I could go on, and on, and
on. Secularism removes a lot of the inhibition against being evil, and acts as an accelerant to all of mankind's worst impulses.