Everything that was created by is clean. The way God deals with people are different. The manner He deals with a particular individual can be quite different from the way He deals with another individual.
There was a period of time when God gave an instruction to the Jews not to eat animals like pork and there was a reason for that, but it wasn't a general instruction for everybody.
We can eat whatever we want if it is appealing to us. When God created the animals He gave man dominion over all of them. It is up to us to do with them as we please. It is not compulsory that we must devour every single one of them. We may have our personal reasons as to why we do not want to eat any at all, which is totally understandable. But we shouldn't project it to be an abomination.
The bible made it clear that it is not what goes into a man that defies him, rather it is what comes out from within. Whatever we take in will be passed out in the toilet. They have no significance or whatsoever. But the things that come from within us, our hearts most especially, those are the things that matter the most and be must be concerned about because have the potential of either edifying us or defying us.