“3) there is a podcast by R’ dovid Lichtenstein where he interviewes many leading rabbonim who all say there is nothing wrong with mishechistim who say the rebbe is moshiach”
שקר-שקר-שקר
The fact that you are promoting your Moshiach sheker does not allow you to make up things. On the other hand, I am not too surprised that a follower of a Moshiach sheker would not suffice with that, and would add additional falsehood to it. But it still is wrong. For shame.