If the onion friends had a donation page up to support a terrorist group, I think they should be monitored by security police and raided if there was a reason.

Your case when the bank supports google is not a cause since google is not a terrorist organisation.

In this case of the onion friends, the donations seems to have been going to donations to a anonymous mailer web site, and depending on what is done at that web site, raids could be justified or not. I think the "connection" has been established, which CCC would like to say there is none. Yet, in your own example, you seem to admit a connection, just not a cause for a raid.