The founder of my local maker space was an actual communist party member so yes I know what it means. He was not the only one and I have no doubt other maker spaces with close CCC ties will be similar. Somewhat leftist is the understatement of the year.
Personally I have absolutely no problem with a persons political beliefs so that is not an insult. I have a problem with fascism. If I believe something different I should not be penalized or viewed as a threat.
I am not a fan of the CCC or their organization and will continue to share my experiences of them with others.
They are a lot more compatible than people like to admit.
Both have a strong ethos towards promoting individual liberty, and generally agree somewhat on the approach that an individuals rights have a “limit” when they infringe on the rights of another person.
The main difference seems to be that a lot of libertarians take a strictly individualistic approach, whereas anarchists tend to prefer a mutualism approach.
Honestly, if you explain both in neutral terms to someone, they sound almost the same with minor differences.