The forward had his vehicle vandalised in a sectarian act, which follows the damage done to Celtic striker Anthony Stokes' house recently, and although McCoist admits everybody is over the violence, he is confident Lafferty will remain.
"We are all sick of it," he said.
"Kyle's not any different from the rest of us. Anthony Stokes' window gets panned in and Kyle gets his car done.
"It's a sad reflection, but I still think we are getting better.
"I don't think what has happened would stand in the way of Kyle signing a new deal at Rangers.
"I would certainly hope it doesn't."
Lafferty is out of contract in the summer and some reports suggest he could be tempted back to England at the end of the season.