RABBI Tendler is a huge talmud chacham, and it is not for you to judge him.
Yes, usually I wouldn’t. But when he is a malshin, all bets are off.
Yeravom ben nevat was also the gadol hador before he became an oved avodah zara. And the bnei yisroel were still held to task for not standing up to him, when he suggested worshiping avodah zara. Even though he had a good lomdish explanation.
There is no defense for tendler (?? ????? ????). If he wants to make a takana, he should go to the other rabbonim in his city. If he can convince them-good. If he can’t–he is not allowed to instead institute it via the government.
It is not good enough for him to simply claim that it is sakanas nefashos. I will grant that he thinks it is. But does he have access to information that the rest of the rabbonim in his city do not? If he does, let him show it to them. If his argument is so strong, let him convince the other rabbonim in his city to act together with him. Clearly, the other rabbonim do not agree with him.