They didn't appear to be "tearing anybody down." Accusing people of malice for expressing their opinion is also "not cool."
It's perfectly acceptable to not be a fan of someone's blog posts. It's also perfectly acceptable to express that in a respectful manner which they did.
> what she mostly does is simplify other people's hard work
OP also called Brendan Gregg a "god" in the same post. So Brendan is a "god" but Julia is just distilling other peoples' work? Sounds pretty disrespectful to me.
Why are respectful and critical mutually exclusive?
Do you believe that one negates the other?
I don't mean to pull the argument one way or another one. But, IMO simplifying other people's hard work is hard work too. At least I personally find it to be.
Depending on our experience we can understand OP as being respectful (or not). I would like to give her/him the benefit of the doubt.