I'm not sure if really a muslim has written it and asked this question. However, the response to the statement: "we muslims are not responsible for this", is "yes, you as a community are hugely responsible for this, even if not entirely". The social media has opened up and popularised these hidden facts recently that we ignorant secular Hindus never read into, but if we were to revisit all the famous Bollywood movies at the very least across decades, we see this very anti-Hindu agenda as a design: right from portraying Hindus and Hindu traditional followings as backward, or even criminal in many cases, as opposed to "other" religions, especially Islam, through and to, replacing Hindi words with Hindusthani/ Urdu. Unfortunately, the film industry, print, radio and TV media of yesteryears have brainwashed Hindu generations to an almost complete extent! The bias on the OTT platforms today is right in your face to the point of disgust! Check any popular Hindi webseries in the past few years if anyone feels they have the stomach for it or Google the Hindu discussions on them.
Further, if one were to look at Education Ministry and the people that made the syllabi with bogus history books primary school onwards, one can see as to which religion led that effort to a very difficult point of no reversal.
Finally, a muslim or a secular Hindu has to be really naive, brainwashed or part of the abovesaid machinery oneself to ask a question as to whether they are responsible for our cultural downfall. Apologies, this post of mine addresses only the statement of denial made or hinted at the end of each valid question raised in the post fwded. I am sure we all know the answer to those individual questions.... we have undoubtedly failed as traditional Hindus, but quite a lot of us have woken up with some hope recently. Maybe, the truth brought out in movies like The Kashmir Files and history books being corrected awaken more and bring more hope.
Kind rgds,