HN becoming is an echo chamber where posting while green will get you deleted for no real reason, as I've said in the past.
That's not what happened here. Those comments were killed by anti-abuse software that's particularly sensitive to new accounts. When false positives like that happen, we rely on the community to vouch for them (you have to click on the timestamp of the comment to go to the comment page and then click 'vouch') or email us at email@example.com so we can be sure to see them.
We've unkilled these and marked the account so this shouldn't happen again.