TFP really have been subject to a smear campaign. I differ with them on many points, but to denounce them for anti-clericalism? Well, when 99.9999% of the "clergy" went apostate after the Council, had abandoned the sheep to the wolves, and in fact fed poison to the sheep by way of their heresies, well, yeah, I could understand a bit of anti-clericalism, except that it's an anti-clericalism rooted in practical reality and not in principle, since all of them love the Mass and the Sacraments.
We see 99% of the modern Trad clergy acting like a bunch of babies, fighing over stupidity, acting as if they were asleep during Logic 101 class but then pontificating to everyone as if they were popes and attempting to impose their (often false) positions on the faithful, breaking up families due to their nonsense, fighting over collection basket revenue and money, acting like jerks (like most of the current SSPX leadershp), and continuing to "excommunicate" those such as teh much-maligned "Feeneyites" who actually understand the theology behind the Crisis far better than they do, or others who come to different conclusions on subjects that are far from dogmatically decided by the Church ... they still do themselves no favors.