[Old Yeller]

Why do Protestants have such difficulty with Christians asking Mary to pray for them (this is what "intercession" amounts to), but not with, for instance, asking fellow Protestants to do so??

For there is one God, and one mediator also between God and men, the man Christ Jesus,
1Timothy 2:5 (NASB)

Maybe the Catholic bible omits that part too.

[Wonder Warthog]

"For there is one God, and one mediator also between God and men, the man Christ Jesus, 1Timothy 2:5 (NASB)"

""Maybe the Catholic bible omits that part too."

Nope. It's right there, along with much else that Martin Luther pitched out of the Protestant Bible because, basically, he didn't like what it said.

As he put it....."why should it be so??? Because I, Martin Luther, say it should be so".