Galaxy
The thing is some of the kindest actions that my friends have made is when they have told me I was behaving like an idiot.
Agreed - not about you and your friends, but that is true of me, too?
The ubiquitous 'Be Kind' is pretty meaningless, really. If it means being supportive at all times, and letting people behave as they like, that can often mean being unkind to others. As an example, I have seen lots of memes saying 'It's ok to be kind to yourself. Ok to change your mind. Ok to not go if you don't feel like it', and so on. They mean well, and are encouraging people to think about mental health, but I think they can be counter-productive.
What they miss is that behaving like that is far from kind to the person who was relying on you to turn up, or who had planned for something only to find that you've changed your mind, and so on.
IMO, trying the be kind by telling people that it's ok to do whatever feels good for them is not doing anyone any favours. That attitude won't wash at work, for instance, and it is likely to leave people with few friends and strained family relationships. Sometimes it is kinder to be honest. Not cruel, but honest.
When people think they are being kind and advising friends to put themselves first because they don't know the pain they are going through, they don't know what the impact of doing that is going to be on the people being let down.
I'm rambling now, but it's a bit like the butterfly flapping its wing impacting on the rest of the forest, or however the saying goes.