This article is not a reliable analysis of Catholic doctrine.
Let's look closer at your own question:
"If I have read and understood this correctly, it is OK to be Catholic and a Homosexual, both at the same time. True?"
If "be homosexual" means "be a person who experiences same-sex attraction," true.
There are good Catholics who experience same-sex attraction--- rarely, occasionally, episodically, persistently, whatever --- but they do not "affirm" their confusions, and they shun sinful behavior. This is undoubtedly true even of some revered teachers and even canonized saints. Gerard Manley Hopkins, maybe? John Henry Newman, maybe?
HOWEVER.
If "be homosexual" means "willingly cooperates in same-sex fantasy, verbally supports same-sex erotic behavior, or in practice unrepentantly practices such behavior," the answer is no.
I hope I haven't made myself obscure. Unbidden feelings are not sins. Sometimes I feel as if I'd like to drink myself into oblivion. Sometimes I feel I could commit myriad unchaste acts. Sometimes I feel as if I could strangle certain FReepers. These feelings are flaws in my inner self, and if unresisted, they would be morally wrong; but if I do not cooperate with them, neither in thought, word, or deed, they are not sins.
If I love to fantisize about this stuff, defend it verbally, or worse yet act on it: there you go, that's sin.
And as Arthur McGowan says: at that point, get ye to the Confessional! Ask for grace to overcome these sad, bad, crazy or pathetic tendencies.
Everybody has some sinful tendencies. That's a consequence of Original Sin (the sin that happened near the origin of the human race) -- a flaw in our human nature.
Anybody here got flaws? Welcome to the club! That's why we need a Savior!
“These feelings are flaws in my inner self, and if unresisted, they would be morally wrong; but if I do not cooperate with them, neither in thought, word, or deed, they are not sins.”
These things are indeed sins. Every thought, every action, falls into one of only two categories. Faith or sin.
That said, why not proudly hateful and proudly Catholic? Or proudly pedophilic and proudly Catholic? Or proudly heroin addicted and proudly Catholic? Or proudly dishonest and proudly Catholic.
I agree with you. The author is painfully ignorant.