Straight out of the Bigot's Handbook. Do you have any idea of the divorce rate for heterosexual couples in the US? Its over 40%.
To counter your second claim all I will say is 55 years.
Adorable couple together for 55 years marry as Texas AG blasts Supreme Court ruling
The Bigot's Handbook (I wonder if there really is one they study ) is based on Paul Cameron's flawed and deliberately skewed "studies". Paul Cameron - Wikipedia, the free encyclopedia
Here are 10 myths debunked.
10 Anti-Gay Myths Debunked | Southern Poverty Law Center