Let's all keep this a friendly discussion. We can get annoyed, and respond as such, but that's just going to spark the same reaction from the other half of the discussion. They will respond in kind, furthering your annoyance, until things build to a full argument. We can discuss and disagree without getting annoyed at each other, or at least not letting it show.
This is directed at no one in particular, and at both sides of the discussion. I'm noticing sharper tongues emerging on both sides. Let's pull that back so things can be discussed and stay civil.
If someone says something that provokes you, choose to ignore it rather than take the bait. Instead focus on the points that further the discussion and topic.
If people keep repeating something, let them. They're trying to help, not dwelling, or trying to harp on you. Maybe they aren't the best at giving advice, or maybe they are looking at it from a different perspective that could be a benefit to you, but are lacking the words to share this perspective with you, and repeating it is their way of working out the right words to share it. Either way, even if they don't find the words, letting them repeat it is harmless.