I'm unable to agree with Mr Biglino and Mr Esposito on several fronts.
For a start, bipolar disorder and sociopathy are two entirely different things, with entirely different symptoms. It's not impossible for one person to suffer from both, but that's not what's being said.
Second, I don't think Paul's a sociopath, though there may be a fanatic's touch of the manic to him. There are two places in particular where he appears to be judgmental instead of empathetic ─
1 Thessalonians 2:14 For you, brethren, became imitators of the churches of God in Christ Jesus which are in Judea; for you suffered the same things from your own countrymen as they did from the Jews, 15 who killed both the Lord Jesus and the prophets, and drove us out, and displease God and oppose all men 16 by hindering us from speaking to the Gentiles that they may be saved--so as always to fill up the measure of their sins. But God's wrath has come upon them at last!
and
1 Corinthians 14:33 For God is not a God of confusion but of peace. As in all the churches of the saints, 34 the women should keep silence in the churches. For they are not permitted to speak, but should be subordinate, as even the law says. 35 If there is anything they desire to know, let them ask their husbands at home. For it is shameful for a woman to speak in church. 36 What! Did the word of God originate with you, or are you the only ones it has reached?
My impression of Paul from what he wrote elsewhere about women and Jewish people is that although he was a dingbat, he wasn’t antisemitic or misogynistic (just with hangups, which he acknowledged, about sex as such). Nothing else in Paul comes even close to the sentiments in those passages; and Jews as the "killers of Christ" is much more a sentiment from around John's time (~100 CE) than Paul's in the 50s; so I'm inclined to think both are glosses by later authors incorporated by copyists into the text, or outright forgeries.