i just now spent a good deal of time perusing the site
i did not detect any sinas chinam or any hatred
it seemed to me to be an erliche website
of course i dont know their history or who the people are behind the website, so i have not formed any definite opinion
here is from their main page, seems reasonable to me:
Because their teachers are among those educating our children in mainstream frum schools in nearly every city in North America. What is their curriculum?
Because their shochtim are entrusted with the delicate and precise task of producing kosher meat in greater numbers than any other group and their sofrim are producing significant numbers of sifrei Torah, tefilin and mezuzos. What are their kavanos?
Because their rabbis are leading shuls and guiding and staffing influential kashrus agencies throughout the world. What are the consequences?
Because their ideology is false and our own silence on the subject communicates a very strange message to our children and to the rest of the world.
A Note On Hatred.
We have long noted how Lubavitchers often respond to even the mildest and most balanced criticism with the charge of sinas chinum. This is true no matter how objective or even friendly is the tone of any letter or book on the subject. This is also true regardless of the lack of any evidence of actual bad feeling. It has unfortunately become utterly predictable that the principle reactions to any suggestion that there might be some problems in Chabad ideology or practice consist of deeply emotional (and often incoherent) accusations of personal hatred and venom.
This is a real shame because it makes it virtually impossible for anyone to engage in intelligent and productive dialogue on the issues that really matter.