If the Roman Catholics in your former parish had been nicer would you have stayed?
That's possible that I would not have left initially, but the circumstances which lead to me to turning my life over to God were not connected in any way to Catholicism. If those has still occurred and I still had become a Christian, I think the outcome would be the same.
When I went back to the Catholic church, I went to mass weekly, but that was it. No interaction with anyone at that level. I would still have been reading the Bible and still would have seen the disparity between what it said and what the Catholic church taught.
It may have taken longer but I really do think that the outcome would ultimately have been the same, based on doctrinal issues.
FWIW, I won't go to any Protestant church which teaches doctrine contrary to the clear teaching of Scripture, like the homosexual issue for example, or teaching that any kind of works are necessary for salvation.