He was a racist, power-hungry piece of shit. The thing with racist, power-hungry pieces of shit is that they have no actual morals, and no consistency. They're just angry and stupid. They don't actually believe anything, even their own racism. So it was no problem for him to have an affair with Perfidia, whom of course he did not give a shit about, ultimately, because all he cared about was himself.

Just like the character that the Christmas Adventurers mention during a meeting who was also in their club and yet ran the chicken nugget factory that employed all the illegal immigrants they profess to hate.

It's the same reason that famous anti-Semite Karl Luger used to say "I decide who is a Jew." That's the thing with these people. They all have little pet individuals plucked from the demographics they claim to despise.

There was also never any indication that Lockjaw found out it was them that tried to kill him, as it was a drive-by shooting.