bluntyopsguy
Welcome to the forum. I hate to be the bearer of bad news, but the Malicious Communications Act 1988 makes it a criminal offence to send an electronic communication that conveys a threat. It appears you may have done just that and rather clumsily identified yourself at the same time (although an ISP subscriber check by the police will do the latter anyway).
Free speech is one thing. Threatening to petrol bomb one's neighbour is quite another.