I don't read any 'acceptable' in her statement - I read 'expect' - it's well-known that in poor countries many people are dying in floods. It isn't unexpected. It is a shock when it happens to your street/region, for the first time, and all your advanced infrastructure, well-built housing and comfortable living conditions can't protect you.
However - there is absolutely racism (and unconscious bias) in 'our' broader acceptance of what is happening. Climate disaster is - 'shit happens to someone else - who happens to overwhelmingly be black and brown' - someone should do something, yeah it's not good but I'm not really going to put myself out over it. There is a disconnect - most people when asked would say it's tragic, it's not acceptable - but their (lack of) actions show an underlying acceptance. There is also an acceptance that it's just what happens rather than really confronting the unprecedented changes even in countries that historically flood, have wildfires, storms etc. But I wouldn't pin all of that on her statement.
And then when it happens in Germany and British Columbia to 'people like us' that is the trigger to thinking 'shit I really don't want this to be happening'. In the UK we also have in the back of our minds that it is mild and temperate climate - and although sea level rises and Gulf stream fuckups are going to be pretty bad, there is a complacency that it doesn't feel bad yet and I think Germany in particular is a wake-up call for the UK. It will help with the affinity bias (people like us) but it still it won't help with the fundamental human nature of - well it's not happening to me. We also see even within the UK people aren't that agitated when flooding is happening to someone else and it's not on their doorstep.
As @sohi suggests - being flooded out and having to rebuild in Germany is very much not 'knowing what it must be like to live in Haiti or Bangladesh'. I think even in her shocked state she might realise that.