Criticism without hate, by definition CANNOT be Sin’at hinam.
It cannot be that the lame excuse of sin’at hinam should be employed as an answer to legitimate questions, and obvious contradictions.
Legitimate questions and obvious contradictions deserve serious and to the point answers and explanations, and not flippant responses which many times totally ignore the actual points raised.
To top off the inadequate answers with bogus claims of sin’at hinam, is in itself an incriminating indictment regarding the qualitative poverty of said answers.
I myself , a former supporter and naive victim of its propaganda, harbor no hate whatsoever against habad , nor against the hasidim of habad.
Nevertheless I do criticize their ideology and theology. Without hate.
If something is wrong, it is not hate to say that it is wrong.
Judaism is full of criticism.
Beit Shamai criticized Beit Hillel severely and are nowhere accused of sin’at hinam as a result.
And the list of similar examples across history can go on and on.
Aderaba, it is incumbent on the criticized to supply adequate answers and explanations lekayem ‘vihiyitem neki’im mehashem umiyisrael’.