Yes, it's bad. The modernists whom Pope St. Pius X warned us about have managed to gain the upper hand. It's as though a different Church is forming before our very eyes. It's been going on for years, but now Pope Francis has brought it out into the open. He's one of their own.
A different Church *is* forming before our eyes.
The sooner we wake up, the better.
Since, if I understand you correctly, "their" means "Modernist apostates'", I'd have to ask you to refrain from saying such things with a certainty you cannot possess. You could phrase it as "Is he one of their own?" Or "Is he being deceived and led astray by these apostates?" Or "One can wonder whether..."
I'm not advising being devious and equivocating in speech. I am advising justice in speech, which conforms to what is known.