Someone dedicated an entire website to the topic of Christianity and – with bright, screaming aesthetics – threw themselves at every contradiction they could find. Topics include the existence, or rather non-existence, of the individual person Jesus Christ, the non-existence of Nazareth, the contradictions in the accounts of places and rulers, as well as conflicts with the traditions of other (more advanced) cultures from the same period. The origins of Christianity and its roots in other religions are also described.
Pleasantly striking on the pages: each essay references sources and offers approaches to verify the statements. Verifiable sources help make pages – despite their truly terrible layout – more credible.
No, I haven't verified all the sources – I haven't even read everything, just skimmed through it. Some things I already knew from other sources appear here too, some things are missing (for example, I didn't find a reference to Zoroaster as a source of monotheism). But then again, I haven't worked through everything yet.
The often stomach-aching topic of Jewish religion and its origins (which tends to be appropriated and botched by Nazis) also appears to be fairly well presented.
What is somewhat irritating at first, however, are the somewhat sensationalist titles of the essays – they could easily be taken from tabloid newspapers. But don't worry, the essays behind them are much more sober.