NO, we kashmiris were not converted to Islam forcefully. We became muslims gradually over centuries for various different reasons.
that there was already sizeable muslim presence in kashmir before muslim sultanate was established
https://www.jstor.org/stable/41927246?read-now=1&seq=4#page_scan_tab_contents
https://www.jstor.org/stable/41927246?read-now=1&seq=4#page_scan_tab_contents