Why would he want to do that?
Our history books state clearly that he was a freedom fighter who fought against the evil British.
Of course, let us see some of the facts of this great secular freedom fighter.
In 1785 Tipu Sultan wrote to his Governor of Bekal, Budruz Zaman Khan approving forced conversions of Nairs,
"Your two letters, with the enclosed memorandums of the Nâimâ (Nair) captives, have been received. You did right in causing a hundred and thirty-five of them to be circumcised, and in putting eleven of the youngest of these into the Usud Ilhye band, and the remaining ninety-four into the Ahmedy troops, consigning the whole, at the same time, to the charge of the Kiladar of Nugr (Bednore).
The same year he sent an order to the Faujdar of Calicut, Arshad Ali Baig regarding the treatement of a Gurukul teacher,
"Getting possession of the villain, Goorkul, and of his wife and children, you must forcibly make Mussalmans out of them, and then dispatch the whole under a guard to Seringapatam."
In 1788, Tipu issued a proclamation to the Nairs of kerala, wherein he outlined his new scheme of social reform,
"From the period of the conquest until this day, during twenty-four years, you have been a turbulent and refractory people, and in the wars waged during your rainy season, you have caused number of our warriors to taste the draught of martyrdom. Be it so. What is past is past. Hereafter you must proceed in an opposite manner, dwell quietly and pay your dues like good subjects and since it is the practice with you for one woman to associate with ten men, and you leave your mothers and sisters unconstrained in their obscene practices, and are thence all born in adultery, and are more shameless in your connections than the beasts of the fields : I hereby require you to forsake these sinful practices and be like the rest of mankind; and if you are disobedient to these commands, I have made repeated vows to honour the whole of you with Islam and to march all the chief persons to the seat of Government."
..........now the seculars post picturess saying Tipu sultan was reformed after drinking water from the well
Please share more info.That was knowledgable.
Moroccoan cleric Ibn Battuta who travelled to kerala in 1335 has written about Kerala.
You might want to read his autobiography which is as good as the travels of marco polo.