It is not possible for someone to be a practicing gay and a true Catholic. What most don't seem to understand is Catholicism (for the most part) is not a cafeteia religion -- you don't get to pick and choose which parts you will adhere to.
Homosexual relations are a Sin. Promoting them is promoting Sin (which is yet another sin).
This is 0% theological and 100% political.
Yes. This is like idolotry. Shaping God, molding God into something like your own image, or an image you find more desirable.
When my brother converted from atheism to Reformed Judaism, he said he did it because Reformed Judaism was in line with what he already believed. Making God like him in a sense.