Clinging particularly strongly to unfounded conspiracy theories, making up your own justifications for them, constantly, is indicative of a very serious mental issue that lends itself very strongly to support of ideas such as rejection or diminishing of the holocaust. It of course need not manifest in that way, but when someone spends most of their time with spreading outrageous conspiracy theories that defy all rationality, it is hurtful to discussions, because discussions quickly shift to said worthless conspiracy theories and takes an aggressive turn. Of course it would be preferrable to lead people on a path of critical thinking, but a forum rarely is a good place to achieve that in cases where self-sustaining mythical and counter-factual world views are well-established.
And by the way, I do not insinuate evil motives in Angular Saxophone with his recent denial of (extend of) holocaust and slavery, but evil motives are not always necessary to do harm.
Being credulous or an ideologue is not indicative of severe mental issues. You should probably refrain from commenting on matters you don’t understand.