if i type https://gmail.com/ into my browser, it usually doesn't matter if you have successfully gotten comodo or actalis to issue you a fake certificate for gmail.com, because my browser doesn't try to connect to your malicious server; it tries to connect to google's actual gmail server, and so you don't receive my packets, and your fake certificate does you no good

but, as i said, if you can feed me fake dns results so i connect to the wrong ip, or if you can arrange so that packets to gmail's legitimate ip go to your server instead (for example by having me connect to your wifi), then you can leverage the fake certificate into a successful mitm attack

but your explanation of the part of the basics of tls you understand, incomplete though it is, is irrelevant to the attack i was actually discussing, where someone doesn't like what you're saying (or the communication service you're providing) and gets your cert revoked to shut you up