Can sin be blamed on someone else or is it the responsibility of the individual?
The answer is obvious to me; it is an individual. Yet an individual will look for a way to explain it or place the blame elsewhere.

Ex 32:21-24
Finally, [Moses] turned to Aaron and demanded, “What did these people do to you to make you bring such terrible sin upon them?” Exodus 32:21

Now perhaps Aaron was threatened. He was surrounded by a crowd but it’s not recorded if he was threatened. And it was Aaron that suggested using the gold earrings.

What reason did Aaron give?
“Don’t get so upset, my lord,” Aaron replied. “You yourself know how evil these people are.” Ex 32:22
First – blame it on others.
“I’m not sinful. It’s the people around me. It’s everyone else that got me into this predicament!”
Does that sound familiar?
When I was around 11 years old my cousin found a Playboy magazine in the ditch. I took it home, hid it in the garage, and the other neighborhood boys would come over to look at it.
When one of the moms found out, she confronted me over it. I shifted the blame and said that it was my cousin’s fault. He’s the one that found it.

They said to me, ‘Make us gods who will lead us. We don’t know what happened to this fellow Moses, who brought us here from the land of Egypt.’ Ex 32:23
Second – it’s just a little compromise.
Just a little bit of sin won’t hurt. Perhaps the thought is “I kept them from doing worse!”
You cannot compromise with sinful behavior.
One thing that always gets me is when compromise is used to keep someone else from sinning. I know of parents that will buy alcohol for their teenage son/daughter and friends to drink at the party at their house. The reasoning is the teens are going to go off and drink and this way they’re all safe in a home.
What the parents are doing is illegal in the state of Texas. You cannot serve alcohol to a minor. I don’t read any provision for parents.
What I see are many that claim to be redeemed by Jesus living in the very ways that the Bible speaks against and not just in the area of alcohol.

So I told them, ‘Whoever has gold jewelry, take it off.’ When they brought it to me, I simply threw it into the fire—and out came this calf!” Ex 32:24
Third – it just happened. This is the answer Aaron gave that I love the most. “I melted down the gold and this calf came out!”
Sin doesn’t “just” happen. There is always some thought or planning before it’s committed.
Now perhaps two married people work in the same office and have no intention of committing adultery and in a moment of passion they do!
Something led up to it. Perhaps it was innocent flirtation with no intent.
Do you think that either thought “this is wrong” right before the act?
I don’t think “I didn’t mean to” is a reasonable excuse.

Remember what grandma always said – honesty is the best policy.
Be honest with others and be honest with God.