Mathoo is noted to have greatly supported the mission of Mar Ouseph Kariattil to Rome in order to express tribulations of the Syrian Catholics to the pope.
Kunnassery is most noted for leading the mass exodus of the Syrian Christians in Kaduthurthy to the town of Mulanthuruthy in order to escape the rage of the Vadakkumkur army.
During this time period the Portuguese missionaries were strongly attempting to reunite the Saint Thomas Christians under the Roman Authority of the Catholic Church.
[7] Punnoose would meet with Bishop Joseph Sebastiani in 1663 who was sent by Rome to reconcile the Saint Thomas Christians into the Catholic fold.
Punnoose Tharakan would pledge the support of the Knanaya community and work closely with Sebastiani to ordain Mar Thoma I's cousin and rival Mar Chandy Parambil Parambil would become the be ordained the first Syrian Catholic bishop of the Saint Thomas Christians at Kaduthuruthy Knanaya Valiyapally on February 1, 1663.