So was his example off topic? If a person subjective opinion has power to enforce their subjective opinion on others, one could say subjective opinion can matter objectively.
In that instance its not the opinion that matters, but the guns.
You could say the guns enforced the opinions. I think it was the influence that spread the opinion to others though. The ideology mattered.
No, your ideology doesn't objectively "matter" just because you can enforce it on others. You're playing a word game here.
The ideology was not enforced so much as it spread. The people were not against the ideology.
