Regarding homophobia, i am of the opinion that it is overused and misapplied. Few people meet the clinical definition of “phobic” regarding homosexuality. Im not trying to derail the topic, the video is twisted and culty as culty can be.
I cannot nor will i speak to results of a census as it relates to populations a minor religious group. Theres a dozen reason the census may not capture a population of specific religious group, including people in that group not wanting to self identify to the government (see the video noted in the op as a reason why). Facts are facts. They have grown. Every year for the last 30+ (since the 1975 debacle). Not a lot recently but growth IS growth no matter how hard you try to spin it.