How to Use Displacement node on a title only

Hello,
How can I use the displacement node on a title but nothing else in the composition?

In the nodes I have some smoke coming up from behind the title, and I want to do a wiggle displacement effect on the title, but not on the smoke. However when I add the displacement node to the merge node, it applies it to all the nodes.

Feed the text node into the Displacement node (orange input) then feed the smoke output into the green input of the displacement node. I've used a fast noise to simulate smoke here.
{
Tools = ordered() {
Text1 = TextPlus {
Inputs = {
GlobalOut = Input { Value = 250, },
Width = Input { Value = 1920, },
Height = Input { Value = 1080, },
["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
Red1 = Input { Value = 0.228274, },
Green1 = Input { Value = 0.499157488, },
Blue1 = Input { Value = 0.622, },
StyledText = Input { Value = "Displacement", },
Font = Input { Value = "Open Sans", },
Style = Input { Value = "Bold", },
Size = Input { Value = 0.1654, },
VerticalJustificationNew = Input { Value = 3, },
HorizontalJustificationNew = Input { Value = 3, },
ManualFontKerningPlacement = Input {
Value = StyledText {
Array = {
},
Value = ""
},
},
},
ViewInfo = OperatorInfo { Pos = { 440, -16.5 } },
},
Displace1 = Displace {
Inputs = {
Offset = Input { Value = 0.04, },
RefractionStrength = Input { Value = 0.06, },
Input = Input {
SourceOp = "Text1",
Source = "Output",
},
Foreground = Input {
SourceOp = "FastNoise1",
Source = "Output",
},
},
ViewInfo = OperatorInfo { Pos = { 550, -16.5 } },
},
Merge1 = Merge {
CtrlWZoom = false,
Inputs = {
Background = Input {
SourceOp = "FastNoise1",
Source = "Output",
},
Foreground = Input {
SourceOp = "Displace1",
Source = "Output",
},
PerformDepthMerge = Input { Value = 0, },
},
ViewInfo = OperatorInfo { Pos = { 660, 49.5 } },
},
FastNoise1 = FastNoise {
Inputs = {
GlobalOut = Input { Value = 250, },
Width = Input { Value = 1920, },
Height = Input { Value = 1080, },
["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
Detail = Input { Value = 7.09, },
Contrast = Input { Value = 2.4, },
XScale = Input { Value = 8.82, },
Seethe = Input { Value = 0.08, },
SeetheRate = Input { Value = 0.071, },
Color2Red = Input { Value = 0.843, },
Color2Green = Input { Value = 0.843, },
Color2Blue = Input { Value = 0.843, },
},
ViewInfo = OperatorInfo { Pos = { 440, 49.5 } },
}
}
}