They are in My opinion. All Christian Churches who firmly are founded in, and teach Biblical truths are equally Christian. Mormonism teaches that the Bible is corrupt. Mormonism teaches that we Christian Churches fight, and divide from one another, and so there is no "true" Church among them. And while it might be true that some Christians disagree, the Church (Christ's Church - all CHRISTIAN followers) does not.
When I became Christian, I was delighted at the great unity among Christian Churches. Maybe you should attend some and find out.
Mormons don’t teach that the Bible is corrupt. We love and honor the Bible and the records of truth it contains. We believe it to be the word of God, and we also believe that it has been tampered with. We believe that all truth is from God, and he speaks to all his children, in all times, and doesn’t leave us alone with just a 2000 year old collection of writings that divides Christianity into so many thousands of different denominations and sects because they all interpret the bible differently.
This sums up our feelings about the bible.