Answer: "He wanted more money"
Explanation:
according to http://www.virtualjamestown.org/jrolfe.html#:~:text=John%20Rolfe%20is%20best%20remembered,settlement%20of%20the%20New%20World.
the tabacco idustry was very valuble and lucrtive, not much was known about his personal life so money is probably our best bet for motive