How is したら acting in this sentence: こいつからしたら当然の反応だが


Can anyone help me find out what したら is doing in this sentence:

> くそ。こいつからしたら当然の反応だが

I assume こいつから to be "from these guys", 当然の反応 to be "natural response" and だが
to be "but/however".

Now for the confusing part. The したら seems to be the たら conditional of する.
Could this be "expressing surprise at the condition" like Tae Kim says
[here](http://www.guidetojapanese.org/learn/grammar/conditionals)? Even so,
how does する fit here? Could the speaker be saying something along the lines of
"whatever these guys do, I'm not surprised (It's my natural reaction at this
point)"?

Any help would be much appreciated. I've been coming across more uses of たら
that don't necessarily translate to "if" or "when", so that can partly
contribute to my uncertainty with this problem.




It means ”Shit. For him, it’s a natural response.”  
But I can’t expect why there is “？”. You may understand the meaning by
context.  
からしたら means “for, in one’s opinion”

> 彼からしたら将棋よりもチェスの方が難しい。  
>  For him, chess is more difficult than shogi.  
>  僕からしたら数学で50点を取るのは凄いと思うよ。  
>  In my opinion, it’s great to get 50 points in maths.




It means ”Shit. For him, it’s a natural response.”  
But I can’t expect why there is “？”. You may understand the meaning by
context.  
からしたら means “for, in one’s opinion”

> 彼からしたら将棋よりもチェスの方が難しい。  
>  For him, chess is more difficult than shogi.  
>  僕からしたら数学で50点を取るのは凄いと思うよ。  
>  In my opinion, it’s great to get 50 points in maths.

